Home / 2,820.15-3,891.51-1,560.96

Finding the Fourth Proportional to 2,820.15, 3,891.51 and 1,560.96

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Solution

The fourth proportional to 2,820.15, 3,891.51 and 1,560.96 is: 2,153.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.15 : 3,891.51 = 1,560.96 : x
  2. Step 2: Convert to fraction form
    2,820.15/3,891.51 = 1,560.96/x
  3. Step 3: Cross multiply
    2,820.15x = 3,891.51 × 1,560.96
  4. Step 4: Simplify right side
    2,820.15x = 6,074,491.45
  5. Step 5: Solve for x
    x = 6,074,491.45/2,820.15
  6. Step 6: Final answer
    x = 2,153.96

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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.