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Finding the Fourth Proportional to 19,937.40, 29,906.10 and 10,721.40

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Solution

The fourth proportional to 19,937.40, 29,906.10 and 10,721.40 is: 16,082.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,937.40 : 29,906.10 = 10,721.40 : x
  2. Step 2: Convert to fraction form
    19,937.40/29,906.10 = 10,721.40/x
  3. Step 3: Cross multiply
    19,937.40x = 29,906.10 × 10,721.40
  4. Step 4: Simplify right side
    19,937.40x = 320,635,260.54
  5. Step 5: Solve for x
    x = 320,635,260.54/19,937.40
  6. Step 6: Final answer
    x = 16,082.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.