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Finding the Fourth Proportional to 9,188.79, 12,738.45 and 8,689.83

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Solution

The fourth proportional to 9,188.79, 12,738.45 and 8,689.83 is: 12,046.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,188.79 : 12,738.45 = 8,689.83 : x
  2. Step 2: Convert to fraction form
    9,188.79/12,738.45 = 8,689.83/x
  3. Step 3: Cross multiply
    9,188.79x = 12,738.45 × 8,689.83
  4. Step 4: Simplify right side
    9,188.79x = 110,694,964.96
  5. Step 5: Solve for x
    x = 110,694,964.96/9,188.79
  6. Step 6: Final answer
    x = 12,046.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.