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Finding the Fourth Proportional to 3,939.33, 5,397.71 and 3,881.01

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Solution

The fourth proportional to 3,939.33, 5,397.71 and 3,881.01 is: 5,317.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.33 : 5,397.71 = 3,881.01 : x
  2. Step 2: Convert to fraction form
    3,939.33/5,397.71 = 3,881.01/x
  3. Step 3: Cross multiply
    3,939.33x = 5,397.71 × 3,881.01
  4. Step 4: Simplify right side
    3,939.33x = 20,948,547.08
  5. Step 5: Solve for x
    x = 20,948,547.08/3,939.33
  6. Step 6: Final answer
    x = 5,317.79

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.