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Finding the Fourth Proportional to 18,792.61, 28,202.58 and 15,138.97

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Solution

The fourth proportional to 18,792.61, 28,202.58 and 15,138.97 is: 22,719.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,792.61 : 28,202.58 = 15,138.97 : x
  2. Step 2: Convert to fraction form
    18,792.61/28,202.58 = 15,138.97/x
  3. Step 3: Cross multiply
    18,792.61x = 28,202.58 × 15,138.97
  4. Step 4: Simplify right side
    18,792.61x = 426,957,942.04
  5. Step 5: Solve for x
    x = 426,957,942.04/18,792.61
  6. Step 6: Final answer
    x = 22,719.46

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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.