Home / 21,318.91-29,419.70-11,759.70

Finding the Fourth Proportional to 21,318.91, 29,419.70 and 11,759.70

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Solution

The fourth proportional to 21,318.91, 29,419.70 and 11,759.70 is: 16,228.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.91 : 29,419.70 = 11,759.70 : x
  2. Step 2: Convert to fraction form
    21,318.91/29,419.70 = 11,759.70/x
  3. Step 3: Cross multiply
    21,318.91x = 29,419.70 × 11,759.70
  4. Step 4: Simplify right side
    21,318.91x = 345,966,640.19
  5. Step 5: Solve for x
    x = 345,966,640.19/21,318.91
  6. Step 6: Final answer
    x = 16,228.16

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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.