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Finding the Fourth Proportional to 7,347.95, 10,140.19 and 3,990.77

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Solution

The fourth proportional to 7,347.95, 10,140.19 and 3,990.77 is: 5,507.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,347.95 : 10,140.19 = 3,990.77 : x
  2. Step 2: Convert to fraction form
    7,347.95/10,140.19 = 3,990.77/x
  3. Step 3: Cross multiply
    7,347.95x = 10,140.19 × 3,990.77
  4. Step 4: Simplify right side
    7,347.95x = 40,467,143.39
  5. Step 5: Solve for x
    x = 40,467,143.39/7,347.95
  6. Step 6: Final answer
    x = 5,507.27

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Find fourth proportional to 3,673.97, 5,070.09 and 1,995.38
Half scale
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Double scale
Find fourth proportional to 7,348.95, 10,141.57 and 3,991.77
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.