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Finding the Fourth Proportional to 21,408.81, 29,543.54 and 11,849.09

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Solution

The fourth proportional to 21,408.81, 29,543.54 and 11,849.09 is: 16,351.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,408.81 : 29,543.54 = 11,849.09 : x
  2. Step 2: Convert to fraction form
    21,408.81/29,543.54 = 11,849.09/x
  3. Step 3: Cross multiply
    21,408.81x = 29,543.54 × 11,849.09
  4. Step 4: Simplify right side
    21,408.81x = 350,063,932.40
  5. Step 5: Solve for x
    x = 350,063,932.40/21,408.81
  6. Step 6: Final answer
    x = 16,351.40

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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.