Home / 10,909.40-16,364.10-3,986.60

Finding the Fourth Proportional to 10,909.40, 16,364.10 and 3,986.60

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Solution

The fourth proportional to 10,909.40, 16,364.10 and 3,986.60 is: 5,979.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,909.40 : 16,364.10 = 3,986.60 : x
  2. Step 2: Convert to fraction form
    10,909.40/16,364.10 = 3,986.60/x
  3. Step 3: Cross multiply
    10,909.40x = 16,364.10 × 3,986.60
  4. Step 4: Simplify right side
    10,909.40x = 65,237,121.06
  5. Step 5: Solve for x
    x = 65,237,121.06/10,909.40
  6. Step 6: Final answer
    x = 5,979.90

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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.