Home / 5,219.20-7,830.72-2,140.48

Finding the Fourth Proportional to 5,219.20, 7,830.72 and 2,140.48

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Solution

The fourth proportional to 5,219.20, 7,830.72 and 2,140.48 is: 3,211.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,219.20 : 7,830.72 = 2,140.48 : x
  2. Step 2: Convert to fraction form
    5,219.20/7,830.72 = 2,140.48/x
  3. Step 3: Cross multiply
    5,219.20x = 7,830.72 × 2,140.48
  4. Step 4: Simplify right side
    5,219.20x = 16,761,499.55
  5. Step 5: Solve for x
    x = 16,761,499.55/5,219.20
  6. Step 6: Final answer
    x = 3,211.51

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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.