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Finding the Fourth Proportional to 9,685.95, 13,371.05 and 7,447.05

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Solution

The fourth proportional to 9,685.95, 13,371.05 and 7,447.05 is: 10,280.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,685.95 : 13,371.05 = 7,447.05 : x
  2. Step 2: Convert to fraction form
    9,685.95/13,371.05 = 7,447.05/x
  3. Step 3: Cross multiply
    9,685.95x = 13,371.05 × 7,447.05
  4. Step 4: Simplify right side
    9,685.95x = 99,574,773.81
  5. Step 5: Solve for x
    x = 99,574,773.81/9,685.95
  6. Step 6: Final answer
    x = 10,280.33

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Find fourth proportional to 4,842.98, 6,685.52 and 3,723.52
Half scale
Find fourth proportional to 19,371.90, 26,742.09 and 14,894.09
Double scale
Find fourth proportional to 9,686.95, 13,372.43 and 7,448.05
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.