Home / 3,856.17-5,321.51-2,087.78

Finding the Fourth Proportional to 3,856.17, 5,321.51 and 2,087.78

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Solution

The fourth proportional to 3,856.17, 5,321.51 and 2,087.78 is: 2,881.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.17 : 5,321.51 = 2,087.78 : x
  2. Step 2: Convert to fraction form
    3,856.17/5,321.51 = 2,087.78/x
  3. Step 3: Cross multiply
    3,856.17x = 5,321.51 × 2,087.78
  4. Step 4: Simplify right side
    3,856.17x = 11,110,115.87
  5. Step 5: Solve for x
    x = 11,110,115.87/3,856.17
  6. Step 6: Final answer
    x = 2,881.13

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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.