Home / 9,142.76-12,618.26-5,165.48

Finding the Fourth Proportional to 9,142.76, 12,618.26 and 5,165.48

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Solution

The fourth proportional to 9,142.76, 12,618.26 and 5,165.48 is: 7,129.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,142.76 : 12,618.26 = 5,165.48 : x
  2. Step 2: Convert to fraction form
    9,142.76/12,618.26 = 5,165.48/x
  3. Step 3: Cross multiply
    9,142.76x = 12,618.26 × 5,165.48
  4. Step 4: Simplify right side
    9,142.76x = 65,179,369.66
  5. Step 5: Solve for x
    x = 65,179,369.66/9,142.76
  6. Step 6: Final answer
    x = 7,129.07

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Half 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.