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Finding the Fourth Proportional to 15,889.33, 21,924.87 and 8,815.78

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Solution

The fourth proportional to 15,889.33, 21,924.87 and 8,815.78 is: 12,164.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,889.33 : 21,924.87 = 8,815.78 : x
  2. Step 2: Convert to fraction form
    15,889.33/21,924.87 = 8,815.78/x
  3. Step 3: Cross multiply
    15,889.33x = 21,924.87 × 8,815.78
  4. Step 4: Simplify right side
    15,889.33x = 193,284,720.82
  5. Step 5: Solve for x
    x = 193,284,720.82/15,889.33
  6. Step 6: Final answer
    x = 12,164.44

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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.