Home / 4,911.39-6,777.78-2,815.50

Finding the Fourth Proportional to 4,911.39, 6,777.78 and 2,815.50

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Solution

The fourth proportional to 4,911.39, 6,777.78 and 2,815.50 is: 3,885.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,911.39 : 6,777.78 = 2,815.50 : x
  2. Step 2: Convert to fraction form
    4,911.39/6,777.78 = 2,815.50/x
  3. Step 3: Cross multiply
    4,911.39x = 6,777.78 × 2,815.50
  4. Step 4: Simplify right side
    4,911.39x = 19,082,839.59
  5. Step 5: Solve for x
    x = 19,082,839.59/4,911.39
  6. Step 6: Final answer
    x = 3,885.43

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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.