Home / 18,287.30-27,432.66-5,139.60

Finding the Fourth Proportional to 18,287.30, 27,432.66 and 5,139.60

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Solution

The fourth proportional to 18,287.30, 27,432.66 and 5,139.60 is: 7,709.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,287.30 : 27,432.66 = 5,139.60 : x
  2. Step 2: Convert to fraction form
    18,287.30/27,432.66 = 5,139.60/x
  3. Step 3: Cross multiply
    18,287.30x = 27,432.66 × 5,139.60
  4. Step 4: Simplify right side
    18,287.30x = 140,992,899.34
  5. Step 5: Solve for x
    x = 140,992,899.34/18,287.30
  6. Step 6: Final answer
    x = 7,709.88

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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.