Home / 2,815.60-3,882.96-2,151.22

Finding the Fourth Proportional to 2,815.60, 3,882.96 and 2,151.22

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Solution

The fourth proportional to 2,815.60, 3,882.96 and 2,151.22 is: 2,966.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,815.60 : 3,882.96 = 2,151.22 : x
  2. Step 2: Convert to fraction form
    2,815.60/3,882.96 = 2,151.22/x
  3. Step 3: Cross multiply
    2,815.60x = 3,882.96 × 2,151.22
  4. Step 4: Simplify right side
    2,815.60x = 8,353,101.21
  5. Step 5: Solve for x
    x = 8,353,101.21/2,815.60
  6. Step 6: Final answer
    x = 2,966.72

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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.