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Finding the Fourth Proportional to 9,368.20, 12,881.46 and 8,979.40

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Solution

The fourth proportional to 9,368.20, 12,881.46 and 8,979.40 is: 12,346.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,368.20 : 12,881.46 = 8,979.40 : x
  2. Step 2: Convert to fraction form
    9,368.20/12,881.46 = 8,979.40/x
  3. Step 3: Cross multiply
    9,368.20x = 12,881.46 × 8,979.40
  4. Step 4: Simplify right side
    9,368.20x = 115,667,781.92
  5. Step 5: Solve for x
    x = 115,667,781.92/9,368.20
  6. Step 6: Final answer
    x = 12,346.85

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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.