Home / 2,642.41-3,962.80-2,121.18

Finding the Fourth Proportional to 2,642.41, 3,962.80 and 2,121.18

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Solution

The fourth proportional to 2,642.41, 3,962.80 and 2,121.18 is: 3,181.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,642.41 : 3,962.80 = 2,121.18 : x
  2. Step 2: Convert to fraction form
    2,642.41/3,962.80 = 2,121.18/x
  3. Step 3: Cross multiply
    2,642.41x = 3,962.80 × 2,121.18
  4. Step 4: Simplify right side
    2,642.41x = 8,405,812.10
  5. Step 5: Solve for x
    x = 8,405,812.10/2,642.41
  6. Step 6: Final answer
    x = 3,181.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.