Home / 5,211.78-7,815.36-2,439.24

Finding the Fourth Proportional to 5,211.78, 7,815.36 and 2,439.24

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Solution

The fourth proportional to 5,211.78, 7,815.36 and 2,439.24 is: 3,657.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,211.78 : 7,815.36 = 2,439.24 : x
  2. Step 2: Convert to fraction form
    5,211.78/7,815.36 = 2,439.24/x
  3. Step 3: Cross multiply
    5,211.78x = 7,815.36 × 2,439.24
  4. Step 4: Simplify right side
    5,211.78x = 19,063,538.73
  5. Step 5: Solve for x
    x = 19,063,538.73/5,211.78
  6. Step 6: Final answer
    x = 3,657.78

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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.