Home / 20,619.99-30,890.19-12,306.66

Finding the Fourth Proportional to 20,619.99, 30,890.19 and 12,306.66

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Solution

The fourth proportional to 20,619.99, 30,890.19 and 12,306.66 is: 18,436.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.99 : 30,890.19 = 12,306.66 : x
  2. Step 2: Convert to fraction form
    20,619.99/30,890.19 = 12,306.66/x
  3. Step 3: Cross multiply
    20,619.99x = 30,890.19 × 12,306.66
  4. Step 4: Simplify right side
    20,619.99x = 380,155,065.67
  5. Step 5: Solve for x
    x = 380,155,065.67/20,619.99
  6. Step 6: Final answer
    x = 18,436.24

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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.