Home / 39,425.78-54,408.32-21,521.43

Finding the Fourth Proportional to 39,425.78, 54,408.32 and 21,521.43

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Solution

The fourth proportional to 39,425.78, 54,408.32 and 21,521.43 is: 29,699.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,425.78 : 54,408.32 = 21,521.43 : x
  2. Step 2: Convert to fraction form
    39,425.78/54,408.32 = 21,521.43/x
  3. Step 3: Cross multiply
    39,425.78x = 54,408.32 × 21,521.43
  4. Step 4: Simplify right side
    39,425.78x = 1,170,944,850.30
  5. Step 5: Solve for x
    x = 1,170,944,850.30/39,425.78
  6. Step 6: Final answer
    x = 29,699.98

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1.5x scale

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.