Home / 13,788.39-20,686.52-6,770.43

Finding the Fourth Proportional to 13,788.39, 20,686.52 and 6,770.43

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Solution

The fourth proportional to 13,788.39, 20,686.52 and 6,770.43 is: 10,157.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,788.39 : 20,686.52 = 6,770.43 : x
  2. Step 2: Convert to fraction form
    13,788.39/20,686.52 = 6,770.43/x
  3. Step 3: Cross multiply
    13,788.39x = 20,686.52 × 6,770.43
  4. Step 4: Simplify right side
    13,788.39x = 140,056,609.42
  5. Step 5: Solve for x
    x = 140,056,609.42/13,788.39
  6. Step 6: Final answer
    x = 10,157.57

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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.