Home / 2,816.89-3,886.97-1,557.78

Finding the Fourth Proportional to 2,816.89, 3,886.97 and 1,557.78

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Solution

The fourth proportional to 2,816.89, 3,886.97 and 1,557.78 is: 2,149.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,816.89 : 3,886.97 = 1,557.78 : x
  2. Step 2: Convert to fraction form
    2,816.89/3,886.97 = 1,557.78/x
  3. Step 3: Cross multiply
    2,816.89x = 3,886.97 × 1,557.78
  4. Step 4: Simplify right side
    2,816.89x = 6,055,044.13
  5. Step 5: Solve for x
    x = 6,055,044.13/2,816.89
  6. Step 6: Final answer
    x = 2,149.55

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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.