Home / 2,813.17-3,885.62-2,108.16

Finding the Fourth Proportional to 2,813.17, 3,885.62 and 2,108.16

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Solution

The fourth proportional to 2,813.17, 3,885.62 and 2,108.16 is: 2,911.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.17 : 3,885.62 = 2,108.16 : x
  2. Step 2: Convert to fraction form
    2,813.17/3,885.62 = 2,108.16/x
  3. Step 3: Cross multiply
    2,813.17x = 3,885.62 × 2,108.16
  4. Step 4: Simplify right side
    2,813.17x = 8,191,508.66
  5. Step 5: Solve for x
    x = 8,191,508.66/2,813.17
  6. Step 6: Final answer
    x = 2,911.84

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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.