Home / 21,132.52-31,703.10-7,279.72

Finding the Fourth Proportional to 21,132.52, 31,703.10 and 7,279.72

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Solution

The fourth proportional to 21,132.52, 31,703.10 and 7,279.72 is: 10,921.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,132.52 : 31,703.10 = 7,279.72 : x
  2. Step 2: Convert to fraction form
    21,132.52/31,703.10 = 7,279.72/x
  3. Step 3: Cross multiply
    21,132.52x = 31,703.10 × 7,279.72
  4. Step 4: Simplify right side
    21,132.52x = 230,789,691.13
  5. Step 5: Solve for x
    x = 230,789,691.13/21,132.52
  6. Step 6: Final answer
    x = 10,921.07

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1.5x scale

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.