Home / 3,869.53-5,340-2,101.17

Finding the Fourth Proportional to 3,869.53, 5,340 and 2,101.17

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Solution

The fourth proportional to 3,869.53, 5,340 and 2,101.17 is: 2,899.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,869.53 : 5,340 = 2,101.17 : x
  2. Step 2: Convert to fraction form
    3,869.53/5,340 = 2,101.17/x
  3. Step 3: Cross multiply
    3,869.53x = 5,340 × 2,101.17
  4. Step 4: Simplify right side
    3,869.53x = 11,220,221.10
  5. Step 5: Solve for x
    x = 11,220,221.10/3,869.53
  6. Step 6: Final answer
    x = 2,899.63

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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.