Home / 18,766.89-28,132.11-10,439.28

Finding the Fourth Proportional to 18,766.89, 28,132.11 and 10,439.28

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Solution

The fourth proportional to 18,766.89, 28,132.11 and 10,439.28 is: 15,648.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,766.89 : 28,132.11 = 10,439.28 : x
  2. Step 2: Convert to fraction form
    18,766.89/28,132.11 = 10,439.28/x
  3. Step 3: Cross multiply
    18,766.89x = 28,132.11 × 10,439.28
  4. Step 4: Simplify right side
    18,766.89x = 293,678,973.28
  5. Step 5: Solve for x
    x = 293,678,973.28/18,766.89
  6. Step 6: Final answer
    x = 15,648.78

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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.