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Finding the Fourth Proportional to 18,487.65, 27,729.91 and 7,957.25

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Solution

The fourth proportional to 18,487.65, 27,729.91 and 7,957.25 is: 11,935.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,487.65 : 27,729.91 = 7,957.25 : x
  2. Step 2: Convert to fraction form
    18,487.65/27,729.91 = 7,957.25/x
  3. Step 3: Cross multiply
    18,487.65x = 27,729.91 × 7,957.25
  4. Step 4: Simplify right side
    18,487.65x = 220,653,647.91
  5. Step 5: Solve for x
    x = 220,653,647.91/18,487.65
  6. Step 6: Final answer
    x = 11,935.19

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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.