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Finding the Fourth Proportional to 8,639.40, 12,959.08 and 6,179.02

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Solution

The fourth proportional to 8,639.40, 12,959.08 and 6,179.02 is: 9,268.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.40 : 12,959.08 = 6,179.02 : x
  2. Step 2: Convert to fraction form
    8,639.40/12,959.08 = 6,179.02/x
  3. Step 3: Cross multiply
    8,639.40x = 12,959.08 × 6,179.02
  4. Step 4: Simplify right side
    8,639.40x = 80,074,414.50
  5. Step 5: Solve for x
    x = 80,074,414.50/8,639.40
  6. Step 6: Final answer
    x = 9,268.52

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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.