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Finding the Fourth Proportional to 57,917.68, 86,881.38 and 18,480.40

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Solution

The fourth proportional to 57,917.68, 86,881.38 and 18,480.40 is: 27,722.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,917.68 : 86,881.38 = 18,480.40 : x
  2. Step 2: Convert to fraction form
    57,917.68/86,881.38 = 18,480.40/x
  3. Step 3: Cross multiply
    57,917.68x = 86,881.38 × 18,480.40
  4. Step 4: Simplify right side
    57,917.68x = 1,605,602,654.95
  5. Step 5: Solve for x
    x = 1,605,602,654.95/57,917.68
  6. Step 6: Final answer
    x = 27,722.15

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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.