Home / 13,788.85-20,691.78-6,391.93

Finding the Fourth Proportional to 13,788.85, 20,691.78 and 6,391.93

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Solution

The fourth proportional to 13,788.85, 20,691.78 and 6,391.93 is: 9,591.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,788.85 : 20,691.78 = 6,391.93 : x
  2. Step 2: Convert to fraction form
    13,788.85/20,691.78 = 6,391.93/x
  3. Step 3: Cross multiply
    13,788.85x = 20,691.78 × 6,391.93
  4. Step 4: Simplify right side
    13,788.85x = 132,260,409.34
  5. Step 5: Solve for x
    x = 132,260,409.34/13,788.85
  6. Step 6: Final answer
    x = 9,591.84

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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.