Home / 13,789.85-20,678.56-3,926.88

Finding the Fourth Proportional to 13,789.85, 20,678.56 and 3,926.88

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Solution

The fourth proportional to 13,789.85, 20,678.56 and 3,926.88 is: 5,888.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,789.85 : 20,678.56 = 3,926.88 : x
  2. Step 2: Convert to fraction form
    13,789.85/20,678.56 = 3,926.88/x
  3. Step 3: Cross multiply
    13,789.85x = 20,678.56 × 3,926.88
  4. Step 4: Simplify right side
    13,789.85x = 81,202,213.88
  5. Step 5: Solve for x
    x = 81,202,213.88/13,789.85
  6. Step 6: Final answer
    x = 5,888.55

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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.