Home / 21,122-29,121.84-13,554.98

Finding the Fourth Proportional to 21,122, 29,121.84 and 13,554.98

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Solution

The fourth proportional to 21,122, 29,121.84 and 13,554.98 is: 18,688.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,122 : 29,121.84 = 13,554.98 : x
  2. Step 2: Convert to fraction form
    21,122/29,121.84 = 13,554.98/x
  3. Step 3: Cross multiply
    21,122x = 29,121.84 × 13,554.98
  4. Step 4: Simplify right side
    21,122x = 394,745,958.76
  5. Step 5: Solve for x
    x = 394,745,958.76/21,122
  6. Step 6: Final answer
    x = 18,688.85

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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.