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Finding the Fourth Proportional to 40,956.65, 61,434.92 and 12,879.17

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Solution

The fourth proportional to 40,956.65, 61,434.92 and 12,879.17 is: 19,318.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,956.65 : 61,434.92 = 12,879.17 : x
  2. Step 2: Convert to fraction form
    40,956.65/61,434.92 = 12,879.17/x
  3. Step 3: Cross multiply
    40,956.65x = 61,434.92 × 12,879.17
  4. Step 4: Simplify right side
    40,956.65x = 791,230,407.05
  5. Step 5: Solve for x
    x = 791,230,407.05/40,956.65
  6. Step 6: Final answer
    x = 19,318.73

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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.