Home / 47,987.28-71,981.36-18,398.08

Finding the Fourth Proportional to 47,987.28, 71,981.36 and 18,398.08

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Solution

The fourth proportional to 47,987.28, 71,981.36 and 18,398.08 is: 27,597.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,987.28 : 71,981.36 = 18,398.08 : x
  2. Step 2: Convert to fraction form
    47,987.28/71,981.36 = 18,398.08/x
  3. Step 3: Cross multiply
    47,987.28x = 71,981.36 × 18,398.08
  4. Step 4: Simplify right side
    47,987.28x = 1,324,318,819.79
  5. Step 5: Solve for x
    x = 1,324,318,819.79/47,987.28
  6. Step 6: Final answer
    x = 27,597.29

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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.