Home / 18,721.30-28,081.95-5,578.24

Finding the Fourth Proportional to 18,721.30, 28,081.95 and 5,578.24

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Solution

The fourth proportional to 18,721.30, 28,081.95 and 5,578.24 is: 8,367.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,721.30 : 28,081.95 = 5,578.24 : x
  2. Step 2: Convert to fraction form
    18,721.30/28,081.95 = 5,578.24/x
  3. Step 3: Cross multiply
    18,721.30x = 28,081.95 × 5,578.24
  4. Step 4: Simplify right side
    18,721.30x = 156,647,856.77
  5. Step 5: Solve for x
    x = 156,647,856.77/18,721.30
  6. Step 6: Final answer
    x = 8,367.36

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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.