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Finding the Fourth Proportional to 21,189.69, 29,241.69 and 11,629.74

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Solution

The fourth proportional to 21,189.69, 29,241.69 and 11,629.74 is: 16,049.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,189.69 : 29,241.69 = 11,629.74 : x
  2. Step 2: Convert to fraction form
    21,189.69/29,241.69 = 11,629.74/x
  3. Step 3: Cross multiply
    21,189.69x = 29,241.69 × 11,629.74
  4. Step 4: Simplify right side
    21,189.69x = 340,073,251.86
  5. Step 5: Solve for x
    x = 340,073,251.86/21,189.69
  6. Step 6: Final answer
    x = 16,049.00

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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.