Home / 2,820.17-3,891.80-1,685.96

Finding the Fourth Proportional to 2,820.17, 3,891.80 and 1,685.96

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Solution

The fourth proportional to 2,820.17, 3,891.80 and 1,685.96 is: 2,326.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.17 : 3,891.80 = 1,685.96 : x
  2. Step 2: Convert to fraction form
    2,820.17/3,891.80 = 1,685.96/x
  3. Step 3: Cross multiply
    2,820.17x = 3,891.80 × 1,685.96
  4. Step 4: Simplify right side
    2,820.17x = 6,561,430.89
  5. Step 5: Solve for x
    x = 6,561,430.89/2,820.17
  6. Step 6: Final answer
    x = 2,326.61

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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.