Home / 2,115.39-2,920.01-1,721.73

Finding the Fourth Proportional to 2,115.39, 2,920.01 and 1,721.73

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Solution

The fourth proportional to 2,115.39, 2,920.01 and 1,721.73 is: 2,376.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.39 : 2,920.01 = 1,721.73 : x
  2. Step 2: Convert to fraction form
    2,115.39/2,920.01 = 1,721.73/x
  3. Step 3: Cross multiply
    2,115.39x = 2,920.01 × 1,721.73
  4. Step 4: Simplify right side
    2,115.39x = 5,027,460.21
  5. Step 5: Solve for x
    x = 5,027,460.21/2,115.39
  6. Step 6: Final answer
    x = 2,376.61

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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.