Home / 31,278.09-43,147.62-21,203.13

Finding the Fourth Proportional to 31,278.09, 43,147.62 and 21,203.13

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Solution

The fourth proportional to 31,278.09, 43,147.62 and 21,203.13 is: 29,249.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,278.09 : 43,147.62 = 21,203.13 : x
  2. Step 2: Convert to fraction form
    31,278.09/43,147.62 = 21,203.13/x
  3. Step 3: Cross multiply
    31,278.09x = 43,147.62 × 21,203.13
  4. Step 4: Simplify right side
    31,278.09x = 914,864,596.05
  5. Step 5: Solve for x
    x = 914,864,596.05/31,278.09
  6. Step 6: Final answer
    x = 29,249.38

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Half scale
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Double scale
Find fourth proportional to 31,279.09, 43,149 and 21,204.13
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.