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Finding the Fourth Proportional to 18,815.20, 28,232.52 and 10,052.80

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Solution

The fourth proportional to 18,815.20, 28,232.52 and 10,052.80 is: 15,084.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,815.20 : 28,232.52 = 10,052.80 : x
  2. Step 2: Convert to fraction form
    18,815.20/28,232.52 = 10,052.80/x
  3. Step 3: Cross multiply
    18,815.20x = 28,232.52 × 10,052.80
  4. Step 4: Simplify right side
    18,815.20x = 283,815,877.06
  5. Step 5: Solve for x
    x = 283,815,877.06/18,815.20
  6. Step 6: Final answer
    x = 15,084.39

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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.