Home / 21,155.66-29,195.99-11,724.02

Finding the Fourth Proportional to 21,155.66, 29,195.99 and 11,724.02

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Solution

The fourth proportional to 21,155.66, 29,195.99 and 11,724.02 is: 16,179.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,155.66 : 29,195.99 = 11,724.02 : x
  2. Step 2: Convert to fraction form
    21,155.66/29,195.99 = 11,724.02/x
  3. Step 3: Cross multiply
    21,155.66x = 29,195.99 × 11,724.02
  4. Step 4: Simplify right side
    21,155.66x = 342,294,370.68
  5. Step 5: Solve for x
    x = 342,294,370.68/21,155.66
  6. Step 6: Final answer
    x = 16,179.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.