Home / 2,620.13-3,927.36-1,321.70

Finding the Fourth Proportional to 2,620.13, 3,927.36 and 1,321.70

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Solution

The fourth proportional to 2,620.13, 3,927.36 and 1,321.70 is: 1,981.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.13 : 3,927.36 = 1,321.70 : x
  2. Step 2: Convert to fraction form
    2,620.13/3,927.36 = 1,321.70/x
  3. Step 3: Cross multiply
    2,620.13x = 3,927.36 × 1,321.70
  4. Step 4: Simplify right side
    2,620.13x = 5,190,791.71
  5. Step 5: Solve for x
    x = 5,190,791.71/2,620.13
  6. Step 6: Final answer
    x = 1,981.12

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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.