Home / 3,888.15-5,365.70-2,119.78

Finding the Fourth Proportional to 3,888.15, 5,365.70 and 2,119.78

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Solution

The fourth proportional to 3,888.15, 5,365.70 and 2,119.78 is: 2,925.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.15 : 5,365.70 = 2,119.78 : x
  2. Step 2: Convert to fraction form
    3,888.15/5,365.70 = 2,119.78/x
  3. Step 3: Cross multiply
    3,888.15x = 5,365.70 × 2,119.78
  4. Step 4: Simplify right side
    3,888.15x = 11,374,103.55
  5. Step 5: Solve for x
    x = 11,374,103.55/3,888.15
  6. Step 6: Final answer
    x = 2,925.33

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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.