Home / 3,869.88-5,340.43-2,101.51

Finding the Fourth Proportional to 3,869.88, 5,340.43 and 2,101.51

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Solution

The fourth proportional to 3,869.88, 5,340.43 and 2,101.51 is: 2,900.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.88 : 5,340.43 = 2,101.51 : x
  2. Step 2: Convert to fraction form
    3,869.88/5,340.43 = 2,101.51/x
  3. Step 3: Cross multiply
    3,869.88x = 5,340.43 × 2,101.51
  4. Step 4: Simplify right side
    3,869.88x = 11,222,976.35
  5. Step 5: Solve for x
    x = 11,222,976.35/3,869.88
  6. Step 6: Final answer
    x = 2,900.09

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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.