Home / 13,161.25-18,163.71-7,494.76

Finding the Fourth Proportional to 13,161.25, 18,163.71 and 7,494.76

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Solution

The fourth proportional to 13,161.25, 18,163.71 and 7,494.76 is: 10,343.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,161.25 : 18,163.71 = 7,494.76 : x
  2. Step 2: Convert to fraction form
    13,161.25/18,163.71 = 7,494.76/x
  3. Step 3: Cross multiply
    13,161.25x = 18,163.71 × 7,494.76
  4. Step 4: Simplify right side
    13,161.25x = 136,132,669.86
  5. Step 5: Solve for x
    x = 136,132,669.86/13,161.25
  6. Step 6: Final answer
    x = 10,343.44

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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.