Home / 13,147.22-18,142.88-7,178.92

Finding the Fourth Proportional to 13,147.22, 18,142.88 and 7,178.92

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Solution

The fourth proportional to 13,147.22, 18,142.88 and 7,178.92 is: 9,906.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.22 : 18,142.88 = 7,178.92 : x
  2. Step 2: Convert to fraction form
    13,147.22/18,142.88 = 7,178.92/x
  3. Step 3: Cross multiply
    13,147.22x = 18,142.88 × 7,178.92
  4. Step 4: Simplify right side
    13,147.22x = 130,246,284.09
  5. Step 5: Solve for x
    x = 130,246,284.09/13,147.22
  6. Step 6: Final answer
    x = 9,906.75

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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.