Home / 18,287.85-27,432.80-5,139.20

Finding the Fourth Proportional to 18,287.85, 27,432.80 and 5,139.20

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Solution

The fourth proportional to 18,287.85, 27,432.80 and 5,139.20 is: 7,709.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,287.85 : 27,432.80 = 5,139.20 : x
  2. Step 2: Convert to fraction form
    18,287.85/27,432.80 = 5,139.20/x
  3. Step 3: Cross multiply
    18,287.85x = 27,432.80 × 5,139.20
  4. Step 4: Simplify right side
    18,287.85x = 140,982,482.90
  5. Step 5: Solve for x
    x = 140,982,482.90/18,287.85
  6. Step 6: Final answer
    x = 7,709.08

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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.