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Finding the Fourth Proportional to 43,654.89, 65,480.50 and 12,490.14

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Solution

The fourth proportional to 43,654.89, 65,480.50 and 12,490.14 is: 18,734.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,654.89 : 65,480.50 = 12,490.14 : x
  2. Step 2: Convert to fraction form
    43,654.89/65,480.50 = 12,490.14/x
  3. Step 3: Cross multiply
    43,654.89x = 65,480.50 × 12,490.14
  4. Step 4: Simplify right side
    43,654.89x = 817,860,612.27
  5. Step 5: Solve for x
    x = 817,860,612.27/43,654.89
  6. Step 6: Final answer
    x = 18,734.68

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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.