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Finding the Fourth Proportional to 28,978.47, 43,446.44 and 9,245.66

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Solution

The fourth proportional to 28,978.47, 43,446.44 and 9,245.66 is: 13,861.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,978.47 : 43,446.44 = 9,245.66 : x
  2. Step 2: Convert to fraction form
    28,978.47/43,446.44 = 9,245.66/x
  3. Step 3: Cross multiply
    28,978.47x = 43,446.44 × 9,245.66
  4. Step 4: Simplify right side
    28,978.47x = 401,690,818.33
  5. Step 5: Solve for x
    x = 401,690,818.33/28,978.47
  6. Step 6: Final answer
    x = 13,861.70

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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.