Home / 21,279.52-31,919.28-7,432.48

Finding the Fourth Proportional to 21,279.52, 31,919.28 and 7,432.48

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Solution

The fourth proportional to 21,279.52, 31,919.28 and 7,432.48 is: 11,148.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,279.52 : 31,919.28 = 7,432.48 : x
  2. Step 2: Convert to fraction form
    21,279.52/31,919.28 = 7,432.48/x
  3. Step 3: Cross multiply
    21,279.52x = 31,919.28 × 7,432.48
  4. Step 4: Simplify right side
    21,279.52x = 237,239,410.21
  5. Step 5: Solve for x
    x = 237,239,410.21/21,279.52
  6. Step 6: Final answer
    x = 11,148.72

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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.