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Finding the Fourth Proportional to 28,442.63, 42,663.78 and 7,382.65

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Solution

The fourth proportional to 28,442.63, 42,663.78 and 7,382.65 is: 11,073.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,442.63 : 42,663.78 = 7,382.65 : x
  2. Step 2: Convert to fraction form
    28,442.63/42,663.78 = 7,382.65/x
  3. Step 3: Cross multiply
    28,442.63x = 42,663.78 × 7,382.65
  4. Step 4: Simplify right side
    28,442.63x = 314,971,755.42
  5. Step 5: Solve for x
    x = 314,971,755.42/28,442.63
  6. Step 6: Final answer
    x = 11,073.93

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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.