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Finding the Fourth Proportional to 40,689.92, 60,992.04 and 15,723.20

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Solution

The fourth proportional to 40,689.92, 60,992.04 and 15,723.20 is: 23,568.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,689.92 : 60,992.04 = 15,723.20 : x
  2. Step 2: Convert to fraction form
    40,689.92/60,992.04 = 15,723.20/x
  3. Step 3: Cross multiply
    40,689.92x = 60,992.04 × 15,723.20
  4. Step 4: Simplify right side
    40,689.92x = 958,990,043.33
  5. Step 5: Solve for x
    x = 958,990,043.33/40,689.92
  6. Step 6: Final answer
    x = 23,568.25

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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.