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Finding the Fourth Proportional to 39,657.57, 54,729.03 and 21,753.21

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Solution

The fourth proportional to 39,657.57, 54,729.03 and 21,753.21 is: 30,020.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,657.57 : 54,729.03 = 21,753.21 : x
  2. Step 2: Convert to fraction form
    39,657.57/54,729.03 = 21,753.21/x
  3. Step 3: Cross multiply
    39,657.57x = 54,729.03 × 21,753.21
  4. Step 4: Simplify right side
    39,657.57x = 1,190,532,082.69
  5. Step 5: Solve for x
    x = 1,190,532,082.69/39,657.57
  6. Step 6: Final answer
    x = 30,020.30

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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.