Home / 5,177.96-7,145.56-2,820.12

Finding the Fourth Proportional to 5,177.96, 7,145.56 and 2,820.12

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Solution

The fourth proportional to 5,177.96, 7,145.56 and 2,820.12 is: 3,891.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,177.96 : 7,145.56 = 2,820.12 : x
  2. Step 2: Convert to fraction form
    5,177.96/7,145.56 = 2,820.12/x
  3. Step 3: Cross multiply
    5,177.96x = 7,145.56 × 2,820.12
  4. Step 4: Simplify right side
    5,177.96x = 20,151,336.67
  5. Step 5: Solve for x
    x = 20,151,336.67/5,177.96
  6. Step 6: Final answer
    x = 3,891.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.