Home / 21,688.66-29,713-20,879.17

Finding the Fourth Proportional to 21,688.66, 29,713 and 20,879.17

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Solution

The fourth proportional to 21,688.66, 29,713 and 20,879.17 is: 28,604.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,688.66 : 29,713 = 20,879.17 : x
  2. Step 2: Convert to fraction form
    21,688.66/29,713 = 20,879.17/x
  3. Step 3: Cross multiply
    21,688.66x = 29,713 × 20,879.17
  4. Step 4: Simplify right side
    21,688.66x = 620,382,629.65
  5. Step 5: Solve for x
    x = 620,382,629.65/21,688.66
  6. Step 6: Final answer
    x = 28,604.01

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.