Home / 12,142.40-18,212.97-3,377.39

Finding the Fourth Proportional to 12,142.40, 18,212.97 and 3,377.39

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Solution

The fourth proportional to 12,142.40, 18,212.97 and 3,377.39 is: 5,065.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,142.40 : 18,212.97 = 3,377.39 : x
  2. Step 2: Convert to fraction form
    12,142.40/18,212.97 = 3,377.39/x
  3. Step 3: Cross multiply
    12,142.40x = 18,212.97 × 3,377.39
  4. Step 4: Simplify right side
    12,142.40x = 61,512,302.75
  5. Step 5: Solve for x
    x = 61,512,302.75/12,142.40
  6. Step 6: Final answer
    x = 5,065.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.