Home / 13,131.44-18,120.36-7,162.76

Finding the Fourth Proportional to 13,131.44, 18,120.36 and 7,162.76

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Solution

The fourth proportional to 13,131.44, 18,120.36 and 7,162.76 is: 9,884.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.44 : 18,120.36 = 7,162.76 : x
  2. Step 2: Convert to fraction form
    13,131.44/18,120.36 = 7,162.76/x
  3. Step 3: Cross multiply
    13,131.44x = 18,120.36 × 7,162.76
  4. Step 4: Simplify right side
    13,131.44x = 129,791,789.79
  5. Step 5: Solve for x
    x = 129,791,789.79/13,131.44
  6. Step 6: Final answer
    x = 9,884.05

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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.