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Finding the Fourth Proportional to 8,979.39, 12,394.42 and 6,145.71

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Solution

The fourth proportional to 8,979.39, 12,394.42 and 6,145.71 is: 8,483.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.39 : 12,394.42 = 6,145.71 : x
  2. Step 2: Convert to fraction form
    8,979.39/12,394.42 = 6,145.71/x
  3. Step 3: Cross multiply
    8,979.39x = 12,394.42 × 6,145.71
  4. Step 4: Simplify right side
    8,979.39x = 76,172,449.09
  5. Step 5: Solve for x
    x = 76,172,449.09/8,979.39
  6. Step 6: Final answer
    x = 8,483.03

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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.