Home / 21,539.88-29,724.90-12,108.54

Finding the Fourth Proportional to 21,539.88, 29,724.90 and 12,108.54

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Solution

The fourth proportional to 21,539.88, 29,724.90 and 12,108.54 is: 16,709.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,539.88 : 29,724.90 = 12,108.54 : x
  2. Step 2: Convert to fraction form
    21,539.88/29,724.90 = 12,108.54/x
  3. Step 3: Cross multiply
    21,539.88x = 29,724.90 × 12,108.54
  4. Step 4: Simplify right side
    21,539.88x = 359,925,140.65
  5. Step 5: Solve for x
    x = 359,925,140.65/21,539.88
  6. Step 6: Final answer
    x = 16,709.71

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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.