Home / 21,287.52-31,943.04-8,141.76

Finding the Fourth Proportional to 21,287.52, 31,943.04 and 8,141.76

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Solution

The fourth proportional to 21,287.52, 31,943.04 and 8,141.76 is: 12,217.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.52 : 31,943.04 = 8,141.76 : x
  2. Step 2: Convert to fraction form
    21,287.52/31,943.04 = 8,141.76/x
  3. Step 3: Cross multiply
    21,287.52x = 31,943.04 × 8,141.76
  4. Step 4: Simplify right side
    21,287.52x = 260,072,565.35
  5. Step 5: Solve for x
    x = 260,072,565.35/21,287.52
  6. Step 6: Final answer
    x = 12,217.14

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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.