Home / 2,819.11-3,890.21-1,560.12

Finding the Fourth Proportional to 2,819.11, 3,890.21 and 1,560.12

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Solution

The fourth proportional to 2,819.11, 3,890.21 and 1,560.12 is: 2,152.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.11 : 3,890.21 = 1,560.12 : x
  2. Step 2: Convert to fraction form
    2,819.11/3,890.21 = 1,560.12/x
  3. Step 3: Cross multiply
    2,819.11x = 3,890.21 × 1,560.12
  4. Step 4: Simplify right side
    2,819.11x = 6,069,194.43
  5. Step 5: Solve for x
    x = 6,069,194.43/2,819.11
  6. Step 6: Final answer
    x = 2,152.88

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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.