Home / 19,712.80-29,569.20-13,807.90

Finding the Fourth Proportional to 19,712.80, 29,569.20 and 13,807.90

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Solution

The fourth proportional to 19,712.80, 29,569.20 and 13,807.90 is: 20,711.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,712.80 : 29,569.20 = 13,807.90 : x
  2. Step 2: Convert to fraction form
    19,712.80/29,569.20 = 13,807.90/x
  3. Step 3: Cross multiply
    19,712.80x = 29,569.20 × 13,807.90
  4. Step 4: Simplify right side
    19,712.80x = 408,288,556.68
  5. Step 5: Solve for x
    x = 408,288,556.68/19,712.80
  6. Step 6: Final answer
    x = 20,711.85

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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.