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Finding the Fourth Proportional to 15,522.82, 21,421.88 and 8,449.64

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Solution

The fourth proportional to 15,522.82, 21,421.88 and 8,449.64 is: 11,660.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,522.82 : 21,421.88 = 8,449.64 : x
  2. Step 2: Convert to fraction form
    15,522.82/21,421.88 = 8,449.64/x
  3. Step 3: Cross multiply
    15,522.82x = 21,421.88 × 8,449.64
  4. Step 4: Simplify right side
    15,522.82x = 181,007,174.12
  5. Step 5: Solve for x
    x = 181,007,174.12/15,522.82
  6. Step 6: Final answer
    x = 11,660.71

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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.