Home / 3,888.74-5,366.52-2,120.40

Finding the Fourth Proportional to 3,888.74, 5,366.52 and 2,120.40

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Solution

The fourth proportional to 3,888.74, 5,366.52 and 2,120.40 is: 2,926.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.74 : 5,366.52 = 2,120.40 : x
  2. Step 2: Convert to fraction form
    3,888.74/5,366.52 = 2,120.40/x
  3. Step 3: Cross multiply
    3,888.74x = 5,366.52 × 2,120.40
  4. Step 4: Simplify right side
    3,888.74x = 11,379,169.01
  5. Step 5: Solve for x
    x = 11,379,169.01/3,888.74
  6. Step 6: Final answer
    x = 2,926.18

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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.