Home / 10,891.52-15,034.32-6,915.20

Finding the Fourth Proportional to 10,891.52, 15,034.32 and 6,915.20

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Solution

The fourth proportional to 10,891.52, 15,034.32 and 6,915.20 is: 9,545.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,891.52 : 15,034.32 = 6,915.20 : x
  2. Step 2: Convert to fraction form
    10,891.52/15,034.32 = 6,915.20/x
  3. Step 3: Cross multiply
    10,891.52x = 15,034.32 × 6,915.20
  4. Step 4: Simplify right side
    10,891.52x = 103,965,329.66
  5. Step 5: Solve for x
    x = 103,965,329.66/10,891.52
  6. Step 6: Final answer
    x = 9,545.53

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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.