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Finding the Fourth Proportional to 12,179.52, 16,806.84 and 7,143.12

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Solution

The fourth proportional to 12,179.52, 16,806.84 and 7,143.12 is: 9,856.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,179.52 : 16,806.84 = 7,143.12 : x
  2. Step 2: Convert to fraction form
    12,179.52/16,806.84 = 7,143.12/x
  3. Step 3: Cross multiply
    12,179.52x = 16,806.84 × 7,143.12
  4. Step 4: Simplify right side
    12,179.52x = 120,053,274.94
  5. Step 5: Solve for x
    x = 120,053,274.94/12,179.52
  6. Step 6: Final answer
    x = 9,856.98

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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.