Home / 20,996.20-31,499.76-9,306.64

Finding the Fourth Proportional to 20,996.20, 31,499.76 and 9,306.64

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Solution

The fourth proportional to 20,996.20, 31,499.76 and 9,306.64 is: 13,962.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,996.20 : 31,499.76 = 9,306.64 : x
  2. Step 2: Convert to fraction form
    20,996.20/31,499.76 = 9,306.64/x
  3. Step 3: Cross multiply
    20,996.20x = 31,499.76 × 9,306.64
  4. Step 4: Simplify right side
    20,996.20x = 293,156,926.41
  5. Step 5: Solve for x
    x = 293,156,926.41/20,996.20
  6. Step 6: Final answer
    x = 13,962.38

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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.