Home / 8,140.90-12,211.36-2,945.56

Finding the Fourth Proportional to 8,140.90, 12,211.36 and 2,945.56

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Solution

The fourth proportional to 8,140.90, 12,211.36 and 2,945.56 is: 4,418.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,140.90 : 12,211.36 = 2,945.56 : x
  2. Step 2: Convert to fraction form
    8,140.90/12,211.36 = 2,945.56/x
  3. Step 3: Cross multiply
    8,140.90x = 12,211.36 × 2,945.56
  4. Step 4: Simplify right side
    8,140.90x = 35,969,293.56
  5. Step 5: Solve for x
    x = 35,969,293.56/8,140.90
  6. Step 6: Final answer
    x = 4,418.34

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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.