Home / 12,138.60-18,222.30-6,877.80

Finding the Fourth Proportional to 12,138.60, 18,222.30 and 6,877.80

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Solution

The fourth proportional to 12,138.60, 18,222.30 and 6,877.80 is: 10,324.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.60 : 18,222.30 = 6,877.80 : x
  2. Step 2: Convert to fraction form
    12,138.60/18,222.30 = 6,877.80/x
  3. Step 3: Cross multiply
    12,138.60x = 18,222.30 × 6,877.80
  4. Step 4: Simplify right side
    12,138.60x = 125,329,334.94
  5. Step 5: Solve for x
    x = 125,329,334.94/12,138.60
  6. Step 6: Final answer
    x = 10,324.86

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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.