Home / 20,811.60-28,719.97-11,251.49

Finding the Fourth Proportional to 20,811.60, 28,719.97 and 11,251.49

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Solution

The fourth proportional to 20,811.60, 28,719.97 and 11,251.49 is: 15,527.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,811.60 : 28,719.97 = 11,251.49 : x
  2. Step 2: Convert to fraction form
    20,811.60/28,719.97 = 11,251.49/x
  3. Step 3: Cross multiply
    20,811.60x = 28,719.97 × 11,251.49
  4. Step 4: Simplify right side
    20,811.60x = 323,142,399.00
  5. Step 5: Solve for x
    x = 323,142,399.00/20,811.60
  6. Step 6: Final answer
    x = 15,527.03

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Why These Related Problems?

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