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Finding the Fourth Proportional to 29,476.80, 40,668 and 18,134.64

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Solution

The fourth proportional to 29,476.80, 40,668 and 18,134.64 is: 25,019.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,476.80 : 40,668 = 18,134.64 : x
  2. Step 2: Convert to fraction form
    29,476.80/40,668 = 18,134.64/x
  3. Step 3: Cross multiply
    29,476.80x = 40,668 × 18,134.64
  4. Step 4: Simplify right side
    29,476.80x = 737,499,539.52
  5. Step 5: Solve for x
    x = 737,499,539.52/29,476.80
  6. Step 6: Final answer
    x = 25,019.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.