Home / 38,109.78-52,591.44-21,115.57

Finding the Fourth Proportional to 38,109.78, 52,591.44 and 21,115.57

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Solution

The fourth proportional to 38,109.78, 52,591.44 and 21,115.57 is: 29,139.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,109.78 : 52,591.44 = 21,115.57 : x
  2. Step 2: Convert to fraction form
    38,109.78/52,591.44 = 21,115.57/x
  3. Step 3: Cross multiply
    38,109.78x = 52,591.44 × 21,115.57
  4. Step 4: Simplify right side
    38,109.78x = 1,110,498,232.72
  5. Step 5: Solve for x
    x = 1,110,498,232.72/38,109.78
  6. Step 6: Final answer
    x = 29,139.46

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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.