Home / 15,120.90-20,863.62-9,151.38

Finding the Fourth Proportional to 15,120.90, 20,863.62 and 9,151.38

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Solution

The fourth proportional to 15,120.90, 20,863.62 and 9,151.38 is: 12,626.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,120.90 : 20,863.62 = 9,151.38 : x
  2. Step 2: Convert to fraction form
    15,120.90/20,863.62 = 9,151.38/x
  3. Step 3: Cross multiply
    15,120.90x = 20,863.62 × 9,151.38
  4. Step 4: Simplify right side
    15,120.90x = 190,930,914.80
  5. Step 5: Solve for x
    x = 190,930,914.80/15,120.90
  6. Step 6: Final answer
    x = 12,626.95

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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.