Home / 19,618.71-29,418.84-7,129.92

Finding the Fourth Proportional to 19,618.71, 29,418.84 and 7,129.92

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Solution

The fourth proportional to 19,618.71, 29,418.84 and 7,129.92 is: 10,691.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,618.71 : 29,418.84 = 7,129.92 : x
  2. Step 2: Convert to fraction form
    19,618.71/29,418.84 = 7,129.92/x
  3. Step 3: Cross multiply
    19,618.71x = 29,418.84 × 7,129.92
  4. Step 4: Simplify right side
    19,618.71x = 209,753,975.69
  5. Step 5: Solve for x
    x = 209,753,975.69/19,618.71
  6. Step 6: Final answer
    x = 10,691.53

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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.