Home / 18,287.08-27,430.90-5,139.70

Finding the Fourth Proportional to 18,287.08, 27,430.90 and 5,139.70

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Solution

The fourth proportional to 18,287.08, 27,430.90 and 5,139.70 is: 7,709.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,287.08 : 27,430.90 = 5,139.70 : x
  2. Step 2: Convert to fraction form
    18,287.08/27,430.90 = 5,139.70/x
  3. Step 3: Cross multiply
    18,287.08x = 27,430.90 × 5,139.70
  4. Step 4: Simplify right side
    18,287.08x = 140,986,596.73
  5. Step 5: Solve for x
    x = 140,986,596.73/18,287.08
  6. Step 6: Final answer
    x = 7,709.63

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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.