Home / 2,121.15-3,175.65-1,631.10

Finding the Fourth Proportional to 2,121.15, 3,175.65 and 1,631.10

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Solution

The fourth proportional to 2,121.15, 3,175.65 and 1,631.10 is: 2,441.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.15 : 3,175.65 = 1,631.10 : x
  2. Step 2: Convert to fraction form
    2,121.15/3,175.65 = 1,631.10/x
  3. Step 3: Cross multiply
    2,121.15x = 3,175.65 × 1,631.10
  4. Step 4: Simplify right side
    2,121.15x = 5,179,802.72
  5. Step 5: Solve for x
    x = 5,179,802.72/2,121.15
  6. Step 6: Final answer
    x = 2,441.98

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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.