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Finding the Fourth Proportional to 5,979.86, 8,969.79 and 2,859.13

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Solution

The fourth proportional to 5,979.86, 8,969.79 and 2,859.13 is: 4,288.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,979.86 : 8,969.79 = 2,859.13 : x
  2. Step 2: Convert to fraction form
    5,979.86/8,969.79 = 2,859.13/x
  3. Step 3: Cross multiply
    5,979.86x = 8,969.79 × 2,859.13
  4. Step 4: Simplify right side
    5,979.86x = 25,645,817.62
  5. Step 5: Solve for x
    x = 25,645,817.62/5,979.86
  6. Step 6: Final answer
    x = 4,288.70

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.