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Finding the Fourth Proportional to 8,976.82, 12,393.32 and 7,979.22

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Solution

The fourth proportional to 8,976.82, 12,393.32 and 7,979.22 is: 11,016.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,976.82 : 12,393.32 = 7,979.22 : x
  2. Step 2: Convert to fraction form
    8,976.82/12,393.32 = 7,979.22/x
  3. Step 3: Cross multiply
    8,976.82x = 12,393.32 × 7,979.22
  4. Step 4: Simplify right side
    8,976.82x = 98,889,026.81
  5. Step 5: Solve for x
    x = 98,889,026.81/8,976.82
  6. Step 6: Final answer
    x = 11,016.04

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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.