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Finding the Fourth Proportional to 18,876.87, 28,337.22 and 10,128.87

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Solution

The fourth proportional to 18,876.87, 28,337.22 and 10,128.87 is: 15,205.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,876.87 : 28,337.22 = 10,128.87 : x
  2. Step 2: Convert to fraction form
    18,876.87/28,337.22 = 10,128.87/x
  3. Step 3: Cross multiply
    18,876.87x = 28,337.22 × 10,128.87
  4. Step 4: Simplify right side
    18,876.87x = 287,024,017.54
  5. Step 5: Solve for x
    x = 287,024,017.54/18,876.87
  6. Step 6: Final answer
    x = 15,205.06

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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.