Home / 3,888.56-5,366.04-2,120.15

Finding the Fourth Proportional to 3,888.56, 5,366.04 and 2,120.15

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Solution

The fourth proportional to 3,888.56, 5,366.04 and 2,120.15 is: 2,925.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.56 : 5,366.04 = 2,120.15 : x
  2. Step 2: Convert to fraction form
    3,888.56/5,366.04 = 2,120.15/x
  3. Step 3: Cross multiply
    3,888.56x = 5,366.04 × 2,120.15
  4. Step 4: Simplify right side
    3,888.56x = 11,376,815.17
  5. Step 5: Solve for x
    x = 11,376,815.17/3,888.56
  6. Step 6: Final answer
    x = 2,925.71

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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.