Home / 20,530.95-30,778.20-7,379.79

Finding the Fourth Proportional to 20,530.95, 30,778.20 and 7,379.79

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Solution

The fourth proportional to 20,530.95, 30,778.20 and 7,379.79 is: 11,063.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.95 : 30,778.20 = 7,379.79 : x
  2. Step 2: Convert to fraction form
    20,530.95/30,778.20 = 7,379.79/x
  3. Step 3: Cross multiply
    20,530.95x = 30,778.20 × 7,379.79
  4. Step 4: Simplify right side
    20,530.95x = 227,136,652.58
  5. Step 5: Solve for x
    x = 227,136,652.58/20,530.95
  6. Step 6: Final answer
    x = 11,063.13

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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.