Home / 20,538.60-30,731.10-13,626.60

Finding the Fourth Proportional to 20,538.60, 30,731.10 and 13,626.60

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Solution

The fourth proportional to 20,538.60, 30,731.10 and 13,626.60 is: 20,388.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.60 : 30,731.10 = 13,626.60 : x
  2. Step 2: Convert to fraction form
    20,538.60/30,731.10 = 13,626.60/x
  3. Step 3: Cross multiply
    20,538.60x = 30,731.10 × 13,626.60
  4. Step 4: Simplify right side
    20,538.60x = 418,760,407.26
  5. Step 5: Solve for x
    x = 418,760,407.26/20,538.60
  6. Step 6: Final answer
    x = 20,388.95

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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.