Home / 8,169.30-12,161.57-8,120.70

Finding the Fourth Proportional to 8,169.30, 12,161.57 and 8,120.70

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Solution

The fourth proportional to 8,169.30, 12,161.57 and 8,120.70 is: 12,089.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,169.30 : 12,161.57 = 8,120.70 : x
  2. Step 2: Convert to fraction form
    8,169.30/12,161.57 = 8,120.70/x
  3. Step 3: Cross multiply
    8,169.30x = 12,161.57 × 8,120.70
  4. Step 4: Simplify right side
    8,169.30x = 98,760,420.90
  5. Step 5: Solve for x
    x = 98,760,420.90/8,169.30
  6. Step 6: Final answer
    x = 12,089.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.