Home / 3,856.30-5,321.58-2,177.70

Finding the Fourth Proportional to 3,856.30, 5,321.58 and 2,177.70

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Solution

The fourth proportional to 3,856.30, 5,321.58 and 2,177.70 is: 3,005.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,856.30 : 5,321.58 = 2,177.70 : x
  2. Step 2: Convert to fraction form
    3,856.30/5,321.58 = 2,177.70/x
  3. Step 3: Cross multiply
    3,856.30x = 5,321.58 × 2,177.70
  4. Step 4: Simplify right side
    3,856.30x = 11,588,804.77
  5. Step 5: Solve for x
    x = 11,588,804.77/3,856.30
  6. Step 6: Final answer
    x = 3,005.16

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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.