Home / 4,911.09-6,778.20-2,815.21

Finding the Fourth Proportional to 4,911.09, 6,778.20 and 2,815.21

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Solution

The fourth proportional to 4,911.09, 6,778.20 and 2,815.21 is: 3,885.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,911.09 : 6,778.20 = 2,815.21 : x
  2. Step 2: Convert to fraction form
    4,911.09/6,778.20 = 2,815.21/x
  3. Step 3: Cross multiply
    4,911.09x = 6,778.20 × 2,815.21
  4. Step 4: Simplify right side
    4,911.09x = 19,082,056.42
  5. Step 5: Solve for x
    x = 19,082,056.42/4,911.09
  6. Step 6: Final answer
    x = 3,885.50

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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.