Home / 28,121.56-38,806.23-15,545.50

Finding the Fourth Proportional to 28,121.56, 38,806.23 and 15,545.50

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Solution

The fourth proportional to 28,121.56, 38,806.23 and 15,545.50 is: 21,451.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.56 : 38,806.23 = 15,545.50 : x
  2. Step 2: Convert to fraction form
    28,121.56/38,806.23 = 15,545.50/x
  3. Step 3: Cross multiply
    28,121.56x = 38,806.23 × 15,545.50
  4. Step 4: Simplify right side
    28,121.56x = 603,262,248.47
  5. Step 5: Solve for x
    x = 603,262,248.47/28,121.56
  6. Step 6: Final answer
    x = 21,451.95

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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.