Home / 5,220.45-7,830.72-2,622.78

Finding the Fourth Proportional to 5,220.45, 7,830.72 and 2,622.78

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Solution

The fourth proportional to 5,220.45, 7,830.72 and 2,622.78 is: 3,934.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,220.45 : 7,830.72 = 2,622.78 : x
  2. Step 2: Convert to fraction form
    5,220.45/7,830.72 = 2,622.78/x
  3. Step 3: Cross multiply
    5,220.45x = 7,830.72 × 2,622.78
  4. Step 4: Simplify right side
    5,220.45x = 20,538,255.80
  5. Step 5: Solve for x
    x = 20,538,255.80/5,220.45
  6. Step 6: Final answer
    x = 3,934.19

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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.