Home / 2,817.61-3,885.94-2,111.11

Finding the Fourth Proportional to 2,817.61, 3,885.94 and 2,111.11

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Solution

The fourth proportional to 2,817.61, 3,885.94 and 2,111.11 is: 2,911.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,817.61 : 3,885.94 = 2,111.11 : x
  2. Step 2: Convert to fraction form
    2,817.61/3,885.94 = 2,111.11/x
  3. Step 3: Cross multiply
    2,817.61x = 3,885.94 × 2,111.11
  4. Step 4: Simplify right side
    2,817.61x = 8,203,646.79
  5. Step 5: Solve for x
    x = 8,203,646.79/2,817.61
  6. Step 6: Final answer
    x = 2,911.56

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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.