Home / 5,387.06-8,080.68-1,689.20

Finding the Fourth Proportional to 5,387.06, 8,080.68 and 1,689.20

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Solution

The fourth proportional to 5,387.06, 8,080.68 and 1,689.20 is: 2,533.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,387.06 : 8,080.68 = 1,689.20 : x
  2. Step 2: Convert to fraction form
    5,387.06/8,080.68 = 1,689.20/x
  3. Step 3: Cross multiply
    5,387.06x = 8,080.68 × 1,689.20
  4. Step 4: Simplify right side
    5,387.06x = 13,649,884.66
  5. Step 5: Solve for x
    x = 13,649,884.66/5,387.06
  6. Step 6: Final answer
    x = 2,533.83

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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.