Home / 18,217.70-25,142.28-11,148.80

Finding the Fourth Proportional to 18,217.70, 25,142.28 and 11,148.80

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Solution

The fourth proportional to 18,217.70, 25,142.28 and 11,148.80 is: 15,386.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,217.70 : 25,142.28 = 11,148.80 : x
  2. Step 2: Convert to fraction form
    18,217.70/25,142.28 = 11,148.80/x
  3. Step 3: Cross multiply
    18,217.70x = 25,142.28 × 11,148.80
  4. Step 4: Simplify right side
    18,217.70x = 280,306,251.26
  5. Step 5: Solve for x
    x = 280,306,251.26/18,217.70
  6. Step 6: Final answer
    x = 15,386.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.