Home / 18,217.90-25,143.78-11,146.60

Finding the Fourth Proportional to 18,217.90, 25,143.78 and 11,146.60

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Solution

The fourth proportional to 18,217.90, 25,143.78 and 11,146.60 is: 15,384.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,217.90 : 25,143.78 = 11,146.60 : x
  2. Step 2: Convert to fraction form
    18,217.90/25,143.78 = 11,146.60/x
  3. Step 3: Cross multiply
    18,217.90x = 25,143.78 × 11,146.60
  4. Step 4: Simplify right side
    18,217.90x = 280,267,658.15
  5. Step 5: Solve for x
    x = 280,267,658.15/18,217.90
  6. Step 6: Final answer
    x = 15,384.19

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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.