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Finding the Fourth Proportional to 19,672.80, 29,566.80 and 17,138.40

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Solution

The fourth proportional to 19,672.80, 29,566.80 and 17,138.40 is: 25,757.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,672.80 : 29,566.80 = 17,138.40 : x
  2. Step 2: Convert to fraction form
    19,672.80/29,566.80 = 17,138.40/x
  3. Step 3: Cross multiply
    19,672.80x = 29,566.80 × 17,138.40
  4. Step 4: Simplify right side
    19,672.80x = 506,727,645.12
  5. Step 5: Solve for x
    x = 506,727,645.12/19,672.80
  6. Step 6: Final answer
    x = 25,757.78

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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.