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Finding the Fourth Proportional to 15,684.78, 21,644.43 and 8,611.02

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Solution

The fourth proportional to 15,684.78, 21,644.43 and 8,611.02 is: 11,882.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,684.78 : 21,644.43 = 8,611.02 : x
  2. Step 2: Convert to fraction form
    15,684.78/21,644.43 = 8,611.02/x
  3. Step 3: Cross multiply
    15,684.78x = 21,644.43 × 8,611.02
  4. Step 4: Simplify right side
    15,684.78x = 186,380,619.62
  5. Step 5: Solve for x
    x = 186,380,619.62/15,684.78
  6. Step 6: Final answer
    x = 11,882.90

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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.