Home / 21,318.89-29,419.72-11,759.71

Finding the Fourth Proportional to 21,318.89, 29,419.72 and 11,759.71

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Solution

The fourth proportional to 21,318.89, 29,419.72 and 11,759.71 is: 16,228.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.89 : 29,419.72 = 11,759.71 : x
  2. Step 2: Convert to fraction form
    21,318.89/29,419.72 = 11,759.71/x
  3. Step 3: Cross multiply
    21,318.89x = 29,419.72 × 11,759.71
  4. Step 4: Simplify right side
    21,318.89x = 345,967,169.58
  5. Step 5: Solve for x
    x = 345,967,169.58/21,318.89
  6. Step 6: Final answer
    x = 16,228.20

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1.5x scale

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.