Home / 20,080.35-30,123.17-7,428.39

Finding the Fourth Proportional to 20,080.35, 30,123.17 and 7,428.39

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Solution

The fourth proportional to 20,080.35, 30,123.17 and 7,428.39 is: 11,143.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,080.35 : 30,123.17 = 7,428.39 : x
  2. Step 2: Convert to fraction form
    20,080.35/30,123.17 = 7,428.39/x
  3. Step 3: Cross multiply
    20,080.35x = 30,123.17 × 7,428.39
  4. Step 4: Simplify right side
    20,080.35x = 223,766,654.80
  5. Step 5: Solve for x
    x = 223,766,654.80/20,080.35
  6. Step 6: Final answer
    x = 11,143.56

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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.