Home / 13,139.96-18,131.66-7,552.76

Finding the Fourth Proportional to 13,139.96, 18,131.66 and 7,552.76

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Solution

The fourth proportional to 13,139.96, 18,131.66 and 7,552.76 is: 10,421.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,139.96 : 18,131.66 = 7,552.76 : x
  2. Step 2: Convert to fraction form
    13,139.96/18,131.66 = 7,552.76/x
  3. Step 3: Cross multiply
    13,139.96x = 18,131.66 × 7,552.76
  4. Step 4: Simplify right side
    13,139.96x = 136,944,076.38
  5. Step 5: Solve for x
    x = 136,944,076.38/13,139.96
  6. Step 6: Final answer
    x = 10,421.96

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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.