Home / 39,408.75-54,385.38-21,504.74

Finding the Fourth Proportional to 39,408.75, 54,385.38 and 21,504.74

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Solution

The fourth proportional to 39,408.75, 54,385.38 and 21,504.74 is: 29,677.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,408.75 : 54,385.38 = 21,504.74 : x
  2. Step 2: Convert to fraction form
    39,408.75/54,385.38 = 21,504.74/x
  3. Step 3: Cross multiply
    39,408.75x = 54,385.38 × 21,504.74
  4. Step 4: Simplify right side
    39,408.75x = 1,169,543,238.54
  5. Step 5: Solve for x
    x = 1,169,543,238.54/39,408.75
  6. Step 6: Final answer
    x = 29,677.25

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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.