Home / 3,121.10-4,382.50-3,121.10

Finding the Fourth Proportional to 3,121.10, 4,382.50 and 3,121.10

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Solution

The fourth proportional to 3,121.10, 4,382.50 and 3,121.10 is: 4,382.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.10 : 4,382.50 = 3,121.10 : x
  2. Step 2: Convert to fraction form
    3,121.10/4,382.50 = 3,121.10/x
  3. Step 3: Cross multiply
    3,121.10x = 4,382.50 × 3,121.10
  4. Step 4: Simplify right side
    3,121.10x = 13,678,220.75
  5. Step 5: Solve for x
    x = 13,678,220.75/3,121.10
  6. Step 6: Final answer
    x = 4,382.50

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.