Home / 13,129.44-18,117.60-7,160.76

Finding the Fourth Proportional to 13,129.44, 18,117.60 and 7,160.76

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Solution

The fourth proportional to 13,129.44, 18,117.60 and 7,160.76 is: 9,881.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.44 : 18,117.60 = 7,160.76 : x
  2. Step 2: Convert to fraction form
    13,129.44/18,117.60 = 7,160.76/x
  3. Step 3: Cross multiply
    13,129.44x = 18,117.60 × 7,160.76
  4. Step 4: Simplify right side
    13,129.44x = 129,735,785.38
  5. Step 5: Solve for x
    x = 129,735,785.38/13,129.44
  6. Step 6: Final answer
    x = 9,881.29

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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.