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Finding the Fourth Proportional to 19,400.88, 29,101.11 and 13,678.29

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Solution

The fourth proportional to 19,400.88, 29,101.11 and 13,678.29 is: 20,517.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,400.88 : 29,101.11 = 13,678.29 : x
  2. Step 2: Convert to fraction form
    19,400.88/29,101.11 = 13,678.29/x
  3. Step 3: Cross multiply
    19,400.88x = 29,101.11 × 13,678.29
  4. Step 4: Simplify right side
    19,400.88x = 398,053,421.90
  5. Step 5: Solve for x
    x = 398,053,421.90/19,400.88
  6. Step 6: Final answer
    x = 20,517.29

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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.