Home / 5,422.80-8,128.61-2,646.04

Finding the Fourth Proportional to 5,422.80, 8,128.61 and 2,646.04

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Solution

The fourth proportional to 5,422.80, 8,128.61 and 2,646.04 is: 3,966.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,422.80 : 8,128.61 = 2,646.04 : x
  2. Step 2: Convert to fraction form
    5,422.80/8,128.61 = 2,646.04/x
  3. Step 3: Cross multiply
    5,422.80x = 8,128.61 × 2,646.04
  4. Step 4: Simplify right side
    5,422.80x = 21,508,627.20
  5. Step 5: Solve for x
    x = 21,508,627.20/5,422.80
  6. Step 6: Final answer
    x = 3,966.33

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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.