Home / 3,888.12-5,365.68-2,119.80

Finding the Fourth Proportional to 3,888.12, 5,365.68 and 2,119.80

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Solution

The fourth proportional to 3,888.12, 5,365.68 and 2,119.80 is: 2,925.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.12 : 5,365.68 = 2,119.80 : x
  2. Step 2: Convert to fraction form
    3,888.12/5,365.68 = 2,119.80/x
  3. Step 3: Cross multiply
    3,888.12x = 5,365.68 × 2,119.80
  4. Step 4: Simplify right side
    3,888.12x = 11,374,168.46
  5. Step 5: Solve for x
    x = 11,374,168.46/3,888.12
  6. Step 6: Final answer
    x = 2,925.36

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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.