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Finding the Fourth Proportional to 19,909.92, 29,865.12 and 13,028.16

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Solution

The fourth proportional to 19,909.92, 29,865.12 and 13,028.16 is: 19,542.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,909.92 : 29,865.12 = 13,028.16 : x
  2. Step 2: Convert to fraction form
    19,909.92/29,865.12 = 13,028.16/x
  3. Step 3: Cross multiply
    19,909.92x = 29,865.12 × 13,028.16
  4. Step 4: Simplify right side
    19,909.92x = 389,087,561.78
  5. Step 5: Solve for x
    x = 389,087,561.78/19,909.92
  6. Step 6: Final answer
    x = 19,542.40

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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.