Home / 2,820.97-3,892.74-1,561.90

Finding the Fourth Proportional to 2,820.97, 3,892.74 and 1,561.90

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Solution

The fourth proportional to 2,820.97, 3,892.74 and 1,561.90 is: 2,155.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.97 : 3,892.74 = 1,561.90 : x
  2. Step 2: Convert to fraction form
    2,820.97/3,892.74 = 1,561.90/x
  3. Step 3: Cross multiply
    2,820.97x = 3,892.74 × 1,561.90
  4. Step 4: Simplify right side
    2,820.97x = 6,080,070.61
  5. Step 5: Solve for x
    x = 6,080,070.61/2,820.97
  6. Step 6: Final answer
    x = 2,155.31

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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.