Home / 2,820.35-3,891.99-1,561.35

Finding the Fourth Proportional to 2,820.35, 3,891.99 and 1,561.35

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Solution

The fourth proportional to 2,820.35, 3,891.99 and 1,561.35 is: 2,154.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.35 : 3,891.99 = 1,561.35 : x
  2. Step 2: Convert to fraction form
    2,820.35/3,891.99 = 1,561.35/x
  3. Step 3: Cross multiply
    2,820.35x = 3,891.99 × 1,561.35
  4. Step 4: Simplify right side
    2,820.35x = 6,076,758.59
  5. Step 5: Solve for x
    x = 6,076,758.59/2,820.35
  6. Step 6: Final answer
    x = 2,154.62

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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.