Home / 13,986.60-20,979.87-4,125.98

Finding the Fourth Proportional to 13,986.60, 20,979.87 and 4,125.98

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Solution

The fourth proportional to 13,986.60, 20,979.87 and 4,125.98 is: 6,188.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,986.60 : 20,979.87 = 4,125.98 : x
  2. Step 2: Convert to fraction form
    13,986.60/20,979.87 = 4,125.98/x
  3. Step 3: Cross multiply
    13,986.60x = 20,979.87 × 4,125.98
  4. Step 4: Simplify right side
    13,986.60x = 86,562,524.02
  5. Step 5: Solve for x
    x = 86,562,524.02/13,986.60
  6. Step 6: Final answer
    x = 6,188.96

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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.