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Finding the Fourth Proportional to 18,877.50, 28,319.49 and 5,731.20

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Solution

The fourth proportional to 18,877.50, 28,319.49 and 5,731.20 is: 8,597.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,877.50 : 28,319.49 = 5,731.20 : x
  2. Step 2: Convert to fraction form
    18,877.50/28,319.49 = 5,731.20/x
  3. Step 3: Cross multiply
    18,877.50x = 28,319.49 × 5,731.20
  4. Step 4: Simplify right side
    18,877.50x = 162,304,661.09
  5. Step 5: Solve for x
    x = 162,304,661.09/18,877.50
  6. Step 6: Final answer
    x = 8,597.78

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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.