Home / 8,178.15-11,286.20-4,641.69

Finding the Fourth Proportional to 8,178.15, 11,286.20 and 4,641.69

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Solution

The fourth proportional to 8,178.15, 11,286.20 and 4,641.69 is: 6,405.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,178.15 : 11,286.20 = 4,641.69 : x
  2. Step 2: Convert to fraction form
    8,178.15/11,286.20 = 4,641.69/x
  3. Step 3: Cross multiply
    8,178.15x = 11,286.20 × 4,641.69
  4. Step 4: Simplify right side
    8,178.15x = 52,387,041.68
  5. Step 5: Solve for x
    x = 52,387,041.68/8,178.15
  6. Step 6: Final answer
    x = 6,405.73

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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.