Home / 39,486.18-54,490.80-21,581.19

Finding the Fourth Proportional to 39,486.18, 54,490.80 and 21,581.19

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Solution

The fourth proportional to 39,486.18, 54,490.80 and 21,581.19 is: 29,781.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,486.18 : 54,490.80 = 21,581.19 : x
  2. Step 2: Convert to fraction form
    39,486.18/54,490.80 = 21,581.19/x
  3. Step 3: Cross multiply
    39,486.18x = 54,490.80 × 21,581.19
  4. Step 4: Simplify right side
    39,486.18x = 1,175,976,308.05
  5. Step 5: Solve for x
    x = 1,175,976,308.05/39,486.18
  6. Step 6: Final answer
    x = 29,781.97

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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.