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Finding the Fourth Proportional to 51,992.92, 77,988.69 and 12,549.85

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Solution

The fourth proportional to 51,992.92, 77,988.69 and 12,549.85 is: 18,824.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,992.92 : 77,988.69 = 12,549.85 : x
  2. Step 2: Convert to fraction form
    51,992.92/77,988.69 = 12,549.85/x
  3. Step 3: Cross multiply
    51,992.92x = 77,988.69 × 12,549.85
  4. Step 4: Simplify right side
    51,992.92x = 978,746,361.20
  5. Step 5: Solve for x
    x = 978,746,361.20/51,992.92
  6. Step 6: Final answer
    x = 18,824.61

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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.