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Finding the Fourth Proportional to 12,158.73, 16,780.90 and 8,800.32

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Solution

The fourth proportional to 12,158.73, 16,780.90 and 8,800.32 is: 12,145.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,158.73 : 16,780.90 = 8,800.32 : x
  2. Step 2: Convert to fraction form
    12,158.73/16,780.90 = 8,800.32/x
  3. Step 3: Cross multiply
    12,158.73x = 16,780.90 × 8,800.32
  4. Step 4: Simplify right side
    12,158.73x = 147,677,275.37
  5. Step 5: Solve for x
    x = 147,677,275.37/12,158.73
  6. Step 6: Final answer
    x = 12,145.78

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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.