Home / 13,146.75-18,142.92-7,178.82

Finding the Fourth Proportional to 13,146.75, 18,142.92 and 7,178.82

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Solution

The fourth proportional to 13,146.75, 18,142.92 and 7,178.82 is: 9,906.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146.75 : 18,142.92 = 7,178.82 : x
  2. Step 2: Convert to fraction form
    13,146.75/18,142.92 = 7,178.82/x
  3. Step 3: Cross multiply
    13,146.75x = 18,142.92 × 7,178.82
  4. Step 4: Simplify right side
    13,146.75x = 130,244,756.95
  5. Step 5: Solve for x
    x = 130,244,756.95/13,146.75
  6. Step 6: Final answer
    x = 9,906.99

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Half scale
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Double scale
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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.