Home / 12,112.80-18,144.90-8,176.20

Finding the Fourth Proportional to 12,112.80, 18,144.90 and 8,176.20

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Solution

The fourth proportional to 12,112.80, 18,144.90 and 8,176.20 is: 12,247.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,112.80 : 18,144.90 = 8,176.20 : x
  2. Step 2: Convert to fraction form
    12,112.80/18,144.90 = 8,176.20/x
  3. Step 3: Cross multiply
    12,112.80x = 18,144.90 × 8,176.20
  4. Step 4: Simplify right side
    12,112.80x = 148,356,331.38
  5. Step 5: Solve for x
    x = 148,356,331.38/12,112.80
  6. Step 6: Final answer
    x = 12,247.90

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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.