Home / 13,780.80-20,679.30-5,016.60

Finding the Fourth Proportional to 13,780.80, 20,679.30 and 5,016.60

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Solution

The fourth proportional to 13,780.80, 20,679.30 and 5,016.60 is: 7,527.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.80 : 20,679.30 = 5,016.60 : x
  2. Step 2: Convert to fraction form
    13,780.80/20,679.30 = 5,016.60/x
  3. Step 3: Cross multiply
    13,780.80x = 20,679.30 × 5,016.60
  4. Step 4: Simplify right side
    13,780.80x = 103,739,776.38
  5. Step 5: Solve for x
    x = 103,739,776.38/13,780.80
  6. Step 6: Final answer
    x = 7,527.85

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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.