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Finding the Fourth Proportional to 21,661.64, 29,892.22 and 13,599.66

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Solution

The fourth proportional to 21,661.64, 29,892.22 and 13,599.66 is: 18,767.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,661.64 : 29,892.22 = 13,599.66 : x
  2. Step 2: Convert to fraction form
    21,661.64/29,892.22 = 13,599.66/x
  3. Step 3: Cross multiply
    21,661.64x = 29,892.22 × 13,599.66
  4. Step 4: Simplify right side
    21,661.64x = 406,524,028.65
  5. Step 5: Solve for x
    x = 406,524,028.65/21,661.64
  6. Step 6: Final answer
    x = 18,767.00

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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.