Home / 20,563.20-28,377.12-11,131.68

Finding the Fourth Proportional to 20,563.20, 28,377.12 and 11,131.68

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Solution

The fourth proportional to 20,563.20, 28,377.12 and 11,131.68 is: 15,361.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,563.20 : 28,377.12 = 11,131.68 : x
  2. Step 2: Convert to fraction form
    20,563.20/28,377.12 = 11,131.68/x
  3. Step 3: Cross multiply
    20,563.20x = 28,377.12 × 11,131.68
  4. Step 4: Simplify right side
    20,563.20x = 315,885,019.16
  5. Step 5: Solve for x
    x = 315,885,019.16/20,563.20
  6. Step 6: Final answer
    x = 15,361.67

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.