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Finding the Fourth Proportional to 28,362.43, 42,549.78 and 8,642.52

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Solution

The fourth proportional to 28,362.43, 42,549.78 and 8,642.52 is: 12,965.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,362.43 : 42,549.78 = 8,642.52 : x
  2. Step 2: Convert to fraction form
    28,362.43/42,549.78 = 8,642.52/x
  3. Step 3: Cross multiply
    28,362.43x = 42,549.78 × 8,642.52
  4. Step 4: Simplify right side
    28,362.43x = 367,737,324.65
  5. Step 5: Solve for x
    x = 367,737,324.65/28,362.43
  6. Step 6: Final answer
    x = 12,965.65

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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.