Home / 39,422.78-54,402.58-21,518.09

Finding the Fourth Proportional to 39,422.78, 54,402.58 and 21,518.09

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Solution

The fourth proportional to 39,422.78, 54,402.58 and 21,518.09 is: 29,694.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,422.78 : 54,402.58 = 21,518.09 : x
  2. Step 2: Convert to fraction form
    39,422.78/54,402.58 = 21,518.09/x
  3. Step 3: Cross multiply
    39,422.78x = 54,402.58 × 21,518.09
  4. Step 4: Simplify right side
    39,422.78x = 1,170,639,450.53
  5. Step 5: Solve for x
    x = 1,170,639,450.53/39,422.78
  6. Step 6: Final answer
    x = 29,694.49

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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.