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Finding the Fourth Proportional to 12,287.38, 18,431.07 and 4,079.38

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Solution

The fourth proportional to 12,287.38, 18,431.07 and 4,079.38 is: 6,119.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,287.38 : 18,431.07 = 4,079.38 : x
  2. Step 2: Convert to fraction form
    12,287.38/18,431.07 = 4,079.38/x
  3. Step 3: Cross multiply
    12,287.38x = 18,431.07 × 4,079.38
  4. Step 4: Simplify right side
    12,287.38x = 75,187,225.78
  5. Step 5: Solve for x
    x = 75,187,225.78/12,287.38
  6. Step 6: Final answer
    x = 6,119.06

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1.5x scale

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.