Home / 21,276.38-31,929.14-7,425.38

Finding the Fourth Proportional to 21,276.38, 31,929.14 and 7,425.38

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Solution

The fourth proportional to 21,276.38, 31,929.14 and 7,425.38 is: 11,143.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,276.38 : 31,929.14 = 7,425.38 : x
  2. Step 2: Convert to fraction form
    21,276.38/31,929.14 = 7,425.38/x
  3. Step 3: Cross multiply
    21,276.38x = 31,929.14 × 7,425.38
  4. Step 4: Simplify right side
    21,276.38x = 237,085,856.49
  5. Step 5: Solve for x
    x = 237,085,856.49/21,276.38
  6. Step 6: Final answer
    x = 11,143.15

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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.