Home / 13,185.80-19,769.10-5,390.60

Finding the Fourth Proportional to 13,185.80, 19,769.10 and 5,390.60

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Solution

The fourth proportional to 13,185.80, 19,769.10 and 5,390.60 is: 8,081.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,185.80 : 19,769.10 = 5,390.60 : x
  2. Step 2: Convert to fraction form
    13,185.80/19,769.10 = 5,390.60/x
  3. Step 3: Cross multiply
    13,185.80x = 19,769.10 × 5,390.60
  4. Step 4: Simplify right side
    13,185.80x = 106,567,310.46
  5. Step 5: Solve for x
    x = 106,567,310.46/13,185.80
  6. Step 6: Final answer
    x = 8,081.98

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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.