Home / 8,080.16-12,120.48-3,149.60

Finding the Fourth Proportional to 8,080.16, 12,120.48 and 3,149.60

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Solution

The fourth proportional to 8,080.16, 12,120.48 and 3,149.60 is: 4,724.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,080.16 : 12,120.48 = 3,149.60 : x
  2. Step 2: Convert to fraction form
    8,080.16/12,120.48 = 3,149.60/x
  3. Step 3: Cross multiply
    8,080.16x = 12,120.48 × 3,149.60
  4. Step 4: Simplify right side
    8,080.16x = 38,174,663.81
  5. Step 5: Solve for x
    x = 38,174,663.81/8,080.16
  6. Step 6: Final answer
    x = 4,724.49

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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.