Home / 3,877.60-5,350.98-2,109.28

Finding the Fourth Proportional to 3,877.60, 5,350.98 and 2,109.28

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Solution

The fourth proportional to 3,877.60, 5,350.98 and 2,109.28 is: 2,910.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,877.60 : 5,350.98 = 2,109.28 : x
  2. Step 2: Convert to fraction form
    3,877.60/5,350.98 = 2,109.28/x
  3. Step 3: Cross multiply
    3,877.60x = 5,350.98 × 2,109.28
  4. Step 4: Simplify right side
    3,877.60x = 11,286,715.09
  5. Step 5: Solve for x
    x = 11,286,715.09/3,877.60
  6. Step 6: Final answer
    x = 2,910.75

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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.