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Finding the Fourth Proportional to 28,978.30, 43,456.65 and 10,251.10

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Solution

The fourth proportional to 28,978.30, 43,456.65 and 10,251.10 is: 15,372.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978.30 : 43,456.65 = 10,251.10 : x
  2. Step 2: Convert to fraction form
    28,978.30/43,456.65 = 10,251.10/x
  3. Step 3: Cross multiply
    28,978.30x = 43,456.65 × 10,251.10
  4. Step 4: Simplify right side
    28,978.30x = 445,478,464.82
  5. Step 5: Solve for x
    x = 445,478,464.82/28,978.30
  6. Step 6: Final answer
    x = 15,372.83

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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.