Home / 39,486.42-54,489.78-21,581.28

Finding the Fourth Proportional to 39,486.42, 54,489.78 and 21,581.28

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Solution

The fourth proportional to 39,486.42, 54,489.78 and 21,581.28 is: 29,781.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,486.42 : 54,489.78 = 21,581.28 : x
  2. Step 2: Convert to fraction form
    39,486.42/54,489.78 = 21,581.28/x
  3. Step 3: Cross multiply
    39,486.42x = 54,489.78 × 21,581.28
  4. Step 4: Simplify right side
    39,486.42x = 1,175,959,199.32
  5. Step 5: Solve for x
    x = 1,175,959,199.32/39,486.42
  6. Step 6: Final answer
    x = 29,781.36

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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.