Home / 21,438.15-29,584.26-11,877.84

Finding the Fourth Proportional to 21,438.15, 29,584.26 and 11,877.84

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Solution

The fourth proportional to 21,438.15, 29,584.26 and 11,877.84 is: 16,391.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,438.15 : 29,584.26 = 11,877.84 : x
  2. Step 2: Convert to fraction form
    21,438.15/29,584.26 = 11,877.84/x
  3. Step 3: Cross multiply
    21,438.15x = 29,584.26 × 11,877.84
  4. Step 4: Simplify right side
    21,438.15x = 351,397,106.80
  5. Step 5: Solve for x
    x = 351,397,106.80/21,438.15
  6. Step 6: Final answer
    x = 16,391.20

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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.