Home / 3,869.69-5,340.11-2,101.28

Finding the Fourth Proportional to 3,869.69, 5,340.11 and 2,101.28

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Solution

The fourth proportional to 3,869.69, 5,340.11 and 2,101.28 is: 2,899.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.69 : 5,340.11 = 2,101.28 : x
  2. Step 2: Convert to fraction form
    3,869.69/5,340.11 = 2,101.28/x
  3. Step 3: Cross multiply
    3,869.69x = 5,340.11 × 2,101.28
  4. Step 4: Simplify right side
    3,869.69x = 11,221,029.13
  5. Step 5: Solve for x
    x = 11,221,029.13/3,869.69
  6. Step 6: Final answer
    x = 2,899.73

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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.