Home / 20,518.67-30,747.22-15,831.65

Finding the Fourth Proportional to 20,518.67, 30,747.22 and 15,831.65

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Solution

The fourth proportional to 20,518.67, 30,747.22 and 15,831.65 is: 23,723.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,518.67 : 30,747.22 = 15,831.65 : x
  2. Step 2: Convert to fraction form
    20,518.67/30,747.22 = 15,831.65/x
  3. Step 3: Cross multiply
    20,518.67x = 30,747.22 × 15,831.65
  4. Step 4: Simplify right side
    20,518.67x = 486,779,262.80
  5. Step 5: Solve for x
    x = 486,779,262.80/20,518.67
  6. Step 6: Final answer
    x = 23,723.72

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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.