Home / 2,981.62-4,473.24-2,121.40

Finding the Fourth Proportional to 2,981.62, 4,473.24 and 2,121.40

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Solution

The fourth proportional to 2,981.62, 4,473.24 and 2,121.40 is: 3,182.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,981.62 : 4,473.24 = 2,121.40 : x
  2. Step 2: Convert to fraction form
    2,981.62/4,473.24 = 2,121.40/x
  3. Step 3: Cross multiply
    2,981.62x = 4,473.24 × 2,121.40
  4. Step 4: Simplify right side
    2,981.62x = 9,489,531.34
  5. Step 5: Solve for x
    x = 9,489,531.34/2,981.62
  6. Step 6: Final answer
    x = 3,182.68

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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.