Home / 39,223.78-54,129.36-21,318.78

Finding the Fourth Proportional to 39,223.78, 54,129.36 and 21,318.78

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Solution

The fourth proportional to 39,223.78, 54,129.36 and 21,318.78 is: 29,420.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,223.78 : 54,129.36 = 21,318.78 : x
  2. Step 2: Convert to fraction form
    39,223.78/54,129.36 = 21,318.78/x
  3. Step 3: Cross multiply
    39,223.78x = 54,129.36 × 21,318.78
  4. Step 4: Simplify right side
    39,223.78x = 1,153,971,593.44
  5. Step 5: Solve for x
    x = 1,153,971,593.44/39,223.78
  6. Step 6: Final answer
    x = 29,420.21

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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.