Home / 8,143.20-12,214.80-4,247.10

Finding the Fourth Proportional to 8,143.20, 12,214.80 and 4,247.10

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Solution

The fourth proportional to 8,143.20, 12,214.80 and 4,247.10 is: 6,370.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,143.20 : 12,214.80 = 4,247.10 : x
  2. Step 2: Convert to fraction form
    8,143.20/12,214.80 = 4,247.10/x
  3. Step 3: Cross multiply
    8,143.20x = 12,214.80 × 4,247.10
  4. Step 4: Simplify right side
    8,143.20x = 51,877,477.08
  5. Step 5: Solve for x
    x = 51,877,477.08/8,143.20
  6. Step 6: Final answer
    x = 6,370.65

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.