Home / 7,721.14-11,581.71-5,422.90

Finding the Fourth Proportional to 7,721.14, 11,581.71 and 5,422.90

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Solution

The fourth proportional to 7,721.14, 11,581.71 and 5,422.90 is: 8,134.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.14 : 11,581.71 = 5,422.90 : x
  2. Step 2: Convert to fraction form
    7,721.14/11,581.71 = 5,422.90/x
  3. Step 3: Cross multiply
    7,721.14x = 11,581.71 × 5,422.90
  4. Step 4: Simplify right side
    7,721.14x = 62,806,455.16
  5. Step 5: Solve for x
    x = 62,806,455.16/7,721.14
  6. Step 6: Final answer
    x = 8,134.35

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Similar ratio
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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.