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Finding the Fourth Proportional to 8,866.80, 12,238.68 and 6,214.92

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Solution

The fourth proportional to 8,866.80, 12,238.68 and 6,214.92 is: 8,578.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,866.80 : 12,238.68 = 6,214.92 : x
  2. Step 2: Convert to fraction form
    8,866.80/12,238.68 = 6,214.92/x
  3. Step 3: Cross multiply
    8,866.80x = 12,238.68 × 6,214.92
  4. Step 4: Simplify right side
    8,866.80x = 76,062,417.11
  5. Step 5: Solve for x
    x = 76,062,417.11/8,866.80
  6. Step 6: Final answer
    x = 8,578.34

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Half scale
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Double scale
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Similar ratio
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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.