Home / 39,778.53-54,894.57-21,874.68

Finding the Fourth Proportional to 39,778.53, 54,894.57 and 21,874.68

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Solution

The fourth proportional to 39,778.53, 54,894.57 and 21,874.68 is: 30,187.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,778.53 : 54,894.57 = 21,874.68 : x
  2. Step 2: Convert to fraction form
    39,778.53/54,894.57 = 21,874.68/x
  3. Step 3: Cross multiply
    39,778.53x = 54,894.57 × 21,874.68
  4. Step 4: Simplify right side
    39,778.53x = 1,200,801,152.49
  5. Step 5: Solve for x
    x = 1,200,801,152.49/39,778.53
  6. Step 6: Final answer
    x = 30,187.17

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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.