Home / 4,911.64-6,778.30-2,815.72

Finding the Fourth Proportional to 4,911.64, 6,778.30 and 2,815.72

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Solution

The fourth proportional to 4,911.64, 6,778.30 and 2,815.72 is: 3,885.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,911.64 : 6,778.30 = 2,815.72 : x
  2. Step 2: Convert to fraction form
    4,911.64/6,778.30 = 2,815.72/x
  3. Step 3: Cross multiply
    4,911.64x = 6,778.30 × 2,815.72
  4. Step 4: Simplify right side
    4,911.64x = 19,085,794.88
  5. Step 5: Solve for x
    x = 19,085,794.88/4,911.64
  6. Step 6: Final answer
    x = 3,885.83

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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.