Home / 3,869.91-5,340.52-2,101.54

Finding the Fourth Proportional to 3,869.91, 5,340.52 and 2,101.54

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Solution

The fourth proportional to 3,869.91, 5,340.52 and 2,101.54 is: 2,900.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.91 : 5,340.52 = 2,101.54 : x
  2. Step 2: Convert to fraction form
    3,869.91/5,340.52 = 2,101.54/x
  3. Step 3: Cross multiply
    3,869.91x = 5,340.52 × 2,101.54
  4. Step 4: Simplify right side
    3,869.91x = 11,223,316.40
  5. Step 5: Solve for x
    x = 11,223,316.40/3,869.91
  6. Step 6: Final answer
    x = 2,900.15

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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.