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Finding the Fourth Proportional to 21,617.87, 29,832.64 and 11,681.87

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Solution

The fourth proportional to 21,617.87, 29,832.64 and 11,681.87 is: 16,120.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,617.87 : 29,832.64 = 11,681.87 : x
  2. Step 2: Convert to fraction form
    21,617.87/29,832.64 = 11,681.87/x
  3. Step 3: Cross multiply
    21,617.87x = 29,832.64 × 11,681.87
  4. Step 4: Simplify right side
    21,617.87x = 348,500,843.87
  5. Step 5: Solve for x
    x = 348,500,843.87/21,617.87
  6. Step 6: Final answer
    x = 16,120.96

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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.