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Finding the Fourth Proportional to 8,735.28, 12,066.48 and 6,979.20

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Solution

The fourth proportional to 8,735.28, 12,066.48 and 6,979.20 is: 9,640.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,735.28 : 12,066.48 = 6,979.20 : x
  2. Step 2: Convert to fraction form
    8,735.28/12,066.48 = 6,979.20/x
  3. Step 3: Cross multiply
    8,735.28x = 12,066.48 × 6,979.20
  4. Step 4: Simplify right side
    8,735.28x = 84,214,377.22
  5. Step 5: Solve for x
    x = 84,214,377.22/8,735.28
  6. Step 6: Final answer
    x = 9,640.72

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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.