Home / 11,139.20-16,689.60-7,241.60

Finding the Fourth Proportional to 11,139.20, 16,689.60 and 7,241.60

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Solution

The fourth proportional to 11,139.20, 16,689.60 and 7,241.60 is: 10,849.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.20 : 16,689.60 = 7,241.60 : x
  2. Step 2: Convert to fraction form
    11,139.20/16,689.60 = 7,241.60/x
  3. Step 3: Cross multiply
    11,139.20x = 16,689.60 × 7,241.60
  4. Step 4: Simplify right side
    11,139.20x = 120,859,407.36
  5. Step 5: Solve for x
    x = 120,859,407.36/11,139.20
  6. Step 6: Final answer
    x = 10,849.92

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1.5x scale

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.