Home / 28,279.92-42,436.20-15,139.62

Finding the Fourth Proportional to 28,279.92, 42,436.20 and 15,139.62

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Solution

The fourth proportional to 28,279.92, 42,436.20 and 15,139.62 is: 22,718.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,279.92 : 42,436.20 = 15,139.62 : x
  2. Step 2: Convert to fraction form
    28,279.92/42,436.20 = 15,139.62/x
  3. Step 3: Cross multiply
    28,279.92x = 42,436.20 × 15,139.62
  4. Step 4: Simplify right side
    28,279.92x = 642,467,942.24
  5. Step 5: Solve for x
    x = 642,467,942.24/28,279.92
  6. Step 6: Final answer
    x = 22,718.17

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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.