Home / 3,888.91-5,366.68-2,120.51

Finding the Fourth Proportional to 3,888.91, 5,366.68 and 2,120.51

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Solution

The fourth proportional to 3,888.91, 5,366.68 and 2,120.51 is: 2,926.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.91 : 5,366.68 = 2,120.51 : x
  2. Step 2: Convert to fraction form
    3,888.91/5,366.68 = 2,120.51/x
  3. Step 3: Cross multiply
    3,888.91x = 5,366.68 × 2,120.51
  4. Step 4: Simplify right side
    3,888.91x = 11,380,098.61
  5. Step 5: Solve for x
    x = 11,380,098.61/3,888.91
  6. Step 6: Final answer
    x = 2,926.30

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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.