Home / 12,077.20-18,115.80-9,999.55

Finding the Fourth Proportional to 12,077.20, 18,115.80 and 9,999.55

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Solution

The fourth proportional to 12,077.20, 18,115.80 and 9,999.55 is: 14,999.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,077.20 : 18,115.80 = 9,999.55 : x
  2. Step 2: Convert to fraction form
    12,077.20/18,115.80 = 9,999.55/x
  3. Step 3: Cross multiply
    12,077.20x = 18,115.80 × 9,999.55
  4. Step 4: Simplify right side
    12,077.20x = 181,149,847.89
  5. Step 5: Solve for x
    x = 181,149,847.89/12,077.20
  6. Step 6: Final answer
    x = 14,999.33

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Similar ratio
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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.