Home / 39,902.97-55,067.28-21,998.19

Finding the Fourth Proportional to 39,902.97, 55,067.28 and 21,998.19

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Solution

The fourth proportional to 39,902.97, 55,067.28 and 21,998.19 is: 30,358.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,902.97 : 55,067.28 = 21,998.19 : x
  2. Step 2: Convert to fraction form
    39,902.97/55,067.28 = 21,998.19/x
  3. Step 3: Cross multiply
    39,902.97x = 55,067.28 × 21,998.19
  4. Step 4: Simplify right side
    39,902.97x = 1,211,380,488.22
  5. Step 5: Solve for x
    x = 1,211,380,488.22/39,902.97
  6. Step 6: Final answer
    x = 30,358.15

Related Problems

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Half scale
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Double scale
Find fourth proportional to 39,903.97, 55,068.66 and 21,999.19
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.