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Finding the Fourth Proportional to 21,174.12, 29,220.48 and 11,742.48

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Solution

The fourth proportional to 21,174.12, 29,220.48 and 11,742.48 is: 16,204.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,174.12 : 29,220.48 = 11,742.48 : x
  2. Step 2: Convert to fraction form
    21,174.12/29,220.48 = 11,742.48/x
  3. Step 3: Cross multiply
    21,174.12x = 29,220.48 × 11,742.48
  4. Step 4: Simplify right side
    21,174.12x = 343,120,901.99
  5. Step 5: Solve for x
    x = 343,120,901.99/21,174.12
  6. Step 6: Final answer
    x = 16,204.73

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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.