Home / 3,876.90-5,349.96-2,108.51

Finding the Fourth Proportional to 3,876.90, 5,349.96 and 2,108.51

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Solution

The fourth proportional to 3,876.90, 5,349.96 and 2,108.51 is: 2,909.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,876.90 : 5,349.96 = 2,108.51 : x
  2. Step 2: Convert to fraction form
    3,876.90/5,349.96 = 2,108.51/x
  3. Step 3: Cross multiply
    3,876.90x = 5,349.96 × 2,108.51
  4. Step 4: Simplify right side
    3,876.90x = 11,280,444.16
  5. Step 5: Solve for x
    x = 11,280,444.16/3,876.90
  6. Step 6: Final answer
    x = 2,909.66

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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.