Home / 3,856.16-5,321.52-2,087.80

Finding the Fourth Proportional to 3,856.16, 5,321.52 and 2,087.80

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Solution

The fourth proportional to 3,856.16, 5,321.52 and 2,087.80 is: 2,881.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.16 : 5,321.52 = 2,087.80 : x
  2. Step 2: Convert to fraction form
    3,856.16/5,321.52 = 2,087.80/x
  3. Step 3: Cross multiply
    3,856.16x = 5,321.52 × 2,087.80
  4. Step 4: Simplify right side
    3,856.16x = 11,110,269.46
  5. Step 5: Solve for x
    x = 11,110,269.46/3,856.16
  6. Step 6: Final answer
    x = 2,881.17

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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.