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Finding the Fourth Proportional to 12,143.80, 16,757.86 and 6,838.52

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Solution

The fourth proportional to 12,143.80, 16,757.86 and 6,838.52 is: 9,436.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,143.80 : 16,757.86 = 6,838.52 : x
  2. Step 2: Convert to fraction form
    12,143.80/16,757.86 = 6,838.52/x
  3. Step 3: Cross multiply
    12,143.80x = 16,757.86 × 6,838.52
  4. Step 4: Simplify right side
    12,143.80x = 114,598,960.77
  5. Step 5: Solve for x
    x = 114,598,960.77/12,143.80
  6. Step 6: Final answer
    x = 9,436.83

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1.5x scale

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.