Home / 2,170.41-2,987.55-1,921.29

Finding the Fourth Proportional to 2,170.41, 2,987.55 and 1,921.29

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Solution

The fourth proportional to 2,170.41, 2,987.55 and 1,921.29 is: 2,644.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170.41 : 2,987.55 = 1,921.29 : x
  2. Step 2: Convert to fraction form
    2,170.41/2,987.55 = 1,921.29/x
  3. Step 3: Cross multiply
    2,170.41x = 2,987.55 × 1,921.29
  4. Step 4: Simplify right side
    2,170.41x = 5,739,949.94
  5. Step 5: Solve for x
    x = 5,739,949.94/2,170.41
  6. Step 6: Final answer
    x = 2,644.64

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Double scale
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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.