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Finding the Fourth Proportional to 40,695.36, 61,036.04 and 12,231.88

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Solution

The fourth proportional to 40,695.36, 61,036.04 and 12,231.88 is: 18,345.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,695.36 : 61,036.04 = 12,231.88 : x
  2. Step 2: Convert to fraction form
    40,695.36/61,036.04 = 12,231.88/x
  3. Step 3: Cross multiply
    40,695.36x = 61,036.04 × 12,231.88
  4. Step 4: Simplify right side
    40,695.36x = 746,585,516.96
  5. Step 5: Solve for x
    x = 746,585,516.96/40,695.36
  6. Step 6: Final answer
    x = 18,345.72

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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.