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Finding the Fourth Proportional to 8,966.40, 12,385.44 and 6,866.88

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Solution

The fourth proportional to 8,966.40, 12,385.44 and 6,866.88 is: 9,485.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,966.40 : 12,385.44 = 6,866.88 : x
  2. Step 2: Convert to fraction form
    8,966.40/12,385.44 = 6,866.88/x
  3. Step 3: Cross multiply
    8,966.40x = 12,385.44 × 6,866.88
  4. Step 4: Simplify right side
    8,966.40x = 85,049,330.23
  5. Step 5: Solve for x
    x = 85,049,330.23/8,966.40
  6. Step 6: Final answer
    x = 9,485.34

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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.