Home / 13,811.85-20,720.78-5,046.75

Finding the Fourth Proportional to 13,811.85, 20,720.78 and 5,046.75

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Solution

The fourth proportional to 13,811.85, 20,720.78 and 5,046.75 is: 7,571.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,811.85 : 20,720.78 = 5,046.75 : x
  2. Step 2: Convert to fraction form
    13,811.85/20,720.78 = 5,046.75/x
  3. Step 3: Cross multiply
    13,811.85x = 20,720.78 × 5,046.75
  4. Step 4: Simplify right side
    13,811.85x = 104,572,571.23
  5. Step 5: Solve for x
    x = 104,572,571.23/13,811.85
  6. Step 6: Final answer
    x = 7,571.22

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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.