Home / 18,877.12-28,337.56-10,129.12

Finding the Fourth Proportional to 18,877.12, 28,337.56 and 10,129.12

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Solution

The fourth proportional to 18,877.12, 28,337.56 and 10,129.12 is: 15,205.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,877.12 : 28,337.56 = 10,129.12 : x
  2. Step 2: Convert to fraction form
    18,877.12/28,337.56 = 10,129.12/x
  3. Step 3: Cross multiply
    18,877.12x = 28,337.56 × 10,129.12
  4. Step 4: Simplify right side
    18,877.12x = 287,034,545.75
  5. Step 5: Solve for x
    x = 287,034,545.75/18,877.12
  6. Step 6: Final answer
    x = 15,205.42

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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.