Home / 21,540.14-29,728.05-12,108.50

Finding the Fourth Proportional to 21,540.14, 29,728.05 and 12,108.50

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Solution

The fourth proportional to 21,540.14, 29,728.05 and 12,108.50 is: 16,711.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,540.14 : 29,728.05 = 12,108.50 : x
  2. Step 2: Convert to fraction form
    21,540.14/29,728.05 = 12,108.50/x
  3. Step 3: Cross multiply
    21,540.14x = 29,728.05 × 12,108.50
  4. Step 4: Simplify right side
    21,540.14x = 359,962,093.43
  5. Step 5: Solve for x
    x = 359,962,093.43/21,540.14
  6. Step 6: Final answer
    x = 16,711.22

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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.