Home / 20,317.68-28,043.08-13,231.76

Finding the Fourth Proportional to 20,317.68, 28,043.08 and 13,231.76

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Solution

The fourth proportional to 20,317.68, 28,043.08 and 13,231.76 is: 18,262.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,317.68 : 28,043.08 = 13,231.76 : x
  2. Step 2: Convert to fraction form
    20,317.68/28,043.08 = 13,231.76/x
  3. Step 3: Cross multiply
    20,317.68x = 28,043.08 × 13,231.76
  4. Step 4: Simplify right side
    20,317.68x = 371,059,304.22
  5. Step 5: Solve for x
    x = 371,059,304.22/20,317.68
  6. Step 6: Final answer
    x = 18,262.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.