Home / 12,488.80-18,731.13-3,721.66

Finding the Fourth Proportional to 12,488.80, 18,731.13 and 3,721.66

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Solution

The fourth proportional to 12,488.80, 18,731.13 and 3,721.66 is: 5,581.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,488.80 : 18,731.13 = 3,721.66 : x
  2. Step 2: Convert to fraction form
    12,488.80/18,731.13 = 3,721.66/x
  3. Step 3: Cross multiply
    12,488.80x = 18,731.13 × 3,721.66
  4. Step 4: Simplify right side
    12,488.80x = 69,710,897.28
  5. Step 5: Solve for x
    x = 69,710,897.28/12,488.80
  6. Step 6: Final answer
    x = 5,581.87

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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.