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Finding the Fourth Proportional to 7,969.81, 10,998.62 and 4,385.05

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Solution

The fourth proportional to 7,969.81, 10,998.62 and 4,385.05 is: 6,051.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,969.81 : 10,998.62 = 4,385.05 : x
  2. Step 2: Convert to fraction form
    7,969.81/10,998.62 = 4,385.05/x
  3. Step 3: Cross multiply
    7,969.81x = 10,998.62 × 4,385.05
  4. Step 4: Simplify right side
    7,969.81x = 48,229,421.71
  5. Step 5: Solve for x
    x = 48,229,421.71/7,969.81
  6. Step 6: Final answer
    x = 6,051.52

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Half scale
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Double scale
Find fourth proportional to 7,970.81, 11,000 and 4,386.05
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.