Home / 20,691.39-31,031.76-9,587.22

Finding the Fourth Proportional to 20,691.39, 31,031.76 and 9,587.22

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Solution

The fourth proportional to 20,691.39, 31,031.76 and 9,587.22 is: 14,378.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.39 : 31,031.76 = 9,587.22 : x
  2. Step 2: Convert to fraction form
    20,691.39/31,031.76 = 9,587.22/x
  3. Step 3: Cross multiply
    20,691.39x = 31,031.76 × 9,587.22
  4. Step 4: Simplify right side
    20,691.39x = 297,508,310.11
  5. Step 5: Solve for x
    x = 297,508,310.11/20,691.39
  6. Step 6: Final answer
    x = 14,378.36

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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.