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Finding the Fourth Proportional to 9,079.80, 13,619.70 and 8,100.60

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Solution

The fourth proportional to 9,079.80, 13,619.70 and 8,100.60 is: 12,150.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,079.80 : 13,619.70 = 8,100.60 : x
  2. Step 2: Convert to fraction form
    9,079.80/13,619.70 = 8,100.60/x
  3. Step 3: Cross multiply
    9,079.80x = 13,619.70 × 8,100.60
  4. Step 4: Simplify right side
    9,079.80x = 110,327,741.82
  5. Step 5: Solve for x
    x = 110,327,741.82/9,079.80
  6. Step 6: Final answer
    x = 12,150.90

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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.