Home / 39,486.21-54,490.83-21,581.21

Finding the Fourth Proportional to 39,486.21, 54,490.83 and 21,581.21

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Solution

The fourth proportional to 39,486.21, 54,490.83 and 21,581.21 is: 29,781.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,486.21 : 54,490.83 = 21,581.21 : x
  2. Step 2: Convert to fraction form
    39,486.21/54,490.83 = 21,581.21/x
  3. Step 3: Cross multiply
    39,486.21x = 54,490.83 × 21,581.21
  4. Step 4: Simplify right side
    39,486.21x = 1,175,978,045.30
  5. Step 5: Solve for x
    x = 1,175,978,045.30/39,486.21
  6. Step 6: Final answer
    x = 29,781.99

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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.