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Finding the Fourth Proportional to 28,234.60, 42,351.90 and 25,642.60

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Solution

The fourth proportional to 28,234.60, 42,351.90 and 25,642.60 is: 38,463.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,234.60 : 42,351.90 = 25,642.60 : x
  2. Step 2: Convert to fraction form
    28,234.60/42,351.90 = 25,642.60/x
  3. Step 3: Cross multiply
    28,234.60x = 42,351.90 × 25,642.60
  4. Step 4: Simplify right side
    28,234.60x = 1,086,012,830.94
  5. Step 5: Solve for x
    x = 1,086,012,830.94/28,234.60
  6. Step 6: Final answer
    x = 38,463.90

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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.