Home / 13,781.44-20,672.40-3,920.96

Finding the Fourth Proportional to 13,781.44, 20,672.40 and 3,920.96

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Solution

The fourth proportional to 13,781.44, 20,672.40 and 3,920.96 is: 5,881.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.44 : 20,672.40 = 3,920.96 : x
  2. Step 2: Convert to fraction form
    13,781.44/20,672.40 = 3,920.96/x
  3. Step 3: Cross multiply
    13,781.44x = 20,672.40 × 3,920.96
  4. Step 4: Simplify right side
    13,781.44x = 81,055,653.50
  5. Step 5: Solve for x
    x = 81,055,653.50/13,781.44
  6. Step 6: Final answer
    x = 5,881.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.