Home / 12,122.80-18,159.90-8,186.20

Finding the Fourth Proportional to 12,122.80, 18,159.90 and 8,186.20

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Solution

The fourth proportional to 12,122.80, 18,159.90 and 8,186.20 is: 12,262.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,122.80 : 18,159.90 = 8,186.20 : x
  2. Step 2: Convert to fraction form
    12,122.80/18,159.90 = 8,186.20/x
  3. Step 3: Cross multiply
    12,122.80x = 18,159.90 × 8,186.20
  4. Step 4: Simplify right side
    12,122.80x = 148,660,573.38
  5. Step 5: Solve for x
    x = 148,660,573.38/12,122.80
  6. Step 6: Final answer
    x = 12,262.89

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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.