Home / 19,939.59-29,909.43-18,721.71

Finding the Fourth Proportional to 19,939.59, 29,909.43 and 18,721.71

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Solution

The fourth proportional to 19,939.59, 29,909.43 and 18,721.71 is: 28,082.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,939.59 : 29,909.43 = 18,721.71 : x
  2. Step 2: Convert to fraction form
    19,939.59/29,909.43 = 18,721.71/x
  3. Step 3: Cross multiply
    19,939.59x = 29,909.43 × 18,721.71
  4. Step 4: Simplify right side
    19,939.59x = 559,955,674.73
  5. Step 5: Solve for x
    x = 559,955,674.73/19,939.59
  6. Step 6: Final answer
    x = 28,082.61

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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.