Home / 21,071.60-31,609.20-6,279.56

Finding the Fourth Proportional to 21,071.60, 31,609.20 and 6,279.56

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Solution

The fourth proportional to 21,071.60, 31,609.20 and 6,279.56 is: 9,419.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.60 : 31,609.20 = 6,279.56 : x
  2. Step 2: Convert to fraction form
    21,071.60/31,609.20 = 6,279.56/x
  3. Step 3: Cross multiply
    21,071.60x = 31,609.20 × 6,279.56
  4. Step 4: Simplify right side
    21,071.60x = 198,491,867.95
  5. Step 5: Solve for x
    x = 198,491,867.95/21,071.60
  6. Step 6: Final answer
    x = 9,419.88

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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.