Home / 21,425.76-32,151.60-8,279.28

Finding the Fourth Proportional to 21,425.76, 32,151.60 and 8,279.28

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Solution

The fourth proportional to 21,425.76, 32,151.60 and 8,279.28 is: 12,423.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,425.76 : 32,151.60 = 8,279.28 : x
  2. Step 2: Convert to fraction form
    21,425.76/32,151.60 = 8,279.28/x
  3. Step 3: Cross multiply
    21,425.76x = 32,151.60 × 8,279.28
  4. Step 4: Simplify right side
    21,425.76x = 266,192,098.85
  5. Step 5: Solve for x
    x = 266,192,098.85/21,425.76
  6. Step 6: Final answer
    x = 12,423.93

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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.