Home / 3,888.29-5,365.85-2,119.90

Finding the Fourth Proportional to 3,888.29, 5,365.85 and 2,119.90

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Solution

The fourth proportional to 3,888.29, 5,365.85 and 2,119.90 is: 2,925.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.29 : 5,365.85 = 2,119.90 : x
  2. Step 2: Convert to fraction form
    3,888.29/5,365.85 = 2,119.90/x
  3. Step 3: Cross multiply
    3,888.29x = 5,365.85 × 2,119.90
  4. Step 4: Simplify right side
    3,888.29x = 11,375,065.42
  5. Step 5: Solve for x
    x = 11,375,065.42/3,888.29
  6. Step 6: Final answer
    x = 2,925.47

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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.