Home / 20,261.61-30,371.76-7,778.43

Finding the Fourth Proportional to 20,261.61, 30,371.76 and 7,778.43

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Solution

The fourth proportional to 20,261.61, 30,371.76 and 7,778.43 is: 11,659.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,261.61 : 30,371.76 = 7,778.43 : x
  2. Step 2: Convert to fraction form
    20,261.61/30,371.76 = 7,778.43/x
  3. Step 3: Cross multiply
    20,261.61x = 30,371.76 × 7,778.43
  4. Step 4: Simplify right side
    20,261.61x = 236,244,609.14
  5. Step 5: Solve for x
    x = 236,244,609.14/20,261.61
  6. Step 6: Final answer
    x = 11,659.72

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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.