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Finding the Fourth Proportional to 18,960.92, 28,441.38 and 7,267.76

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Solution

The fourth proportional to 18,960.92, 28,441.38 and 7,267.76 is: 10,901.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,960.92 : 28,441.38 = 7,267.76 : x
  2. Step 2: Convert to fraction form
    18,960.92/28,441.38 = 7,267.76/x
  3. Step 3: Cross multiply
    18,960.92x = 28,441.38 × 7,267.76
  4. Step 4: Simplify right side
    18,960.92x = 206,705,123.91
  5. Step 5: Solve for x
    x = 206,705,123.91/18,960.92
  6. Step 6: Final answer
    x = 10,901.64

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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.