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Finding the Fourth Proportional to 21,151.67, 29,188.15 and 11,589.82

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Solution

The fourth proportional to 21,151.67, 29,188.15 and 11,589.82 is: 15,993.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.67 : 29,188.15 = 11,589.82 : x
  2. Step 2: Convert to fraction form
    21,151.67/29,188.15 = 11,589.82/x
  3. Step 3: Cross multiply
    21,151.67x = 29,188.15 × 11,589.82
  4. Step 4: Simplify right side
    21,151.67x = 338,285,302.69
  5. Step 5: Solve for x
    x = 338,285,302.69/21,151.67
  6. Step 6: Final answer
    x = 15,993.32

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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.