Home / 7,180.20-9,908.10-4,197.78

Finding the Fourth Proportional to 7,180.20, 9,908.10 and 4,197.78

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Solution

The fourth proportional to 7,180.20, 9,908.10 and 4,197.78 is: 5,792.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,180.20 : 9,908.10 = 4,197.78 : x
  2. Step 2: Convert to fraction form
    7,180.20/9,908.10 = 4,197.78/x
  3. Step 3: Cross multiply
    7,180.20x = 9,908.10 × 4,197.78
  4. Step 4: Simplify right side
    7,180.20x = 41,592,024.02
  5. Step 5: Solve for x
    x = 41,592,024.02/7,180.20
  6. Step 6: Final answer
    x = 5,792.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.