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Finding the Fourth Proportional to 15,845.10, 21,866.10 and 8,771.34

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Solution

The fourth proportional to 15,845.10, 21,866.10 and 8,771.34 is: 12,104.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,845.10 : 21,866.10 = 8,771.34 : x
  2. Step 2: Convert to fraction form
    15,845.10/21,866.10 = 8,771.34/x
  3. Step 3: Cross multiply
    15,845.10x = 21,866.10 × 8,771.34
  4. Step 4: Simplify right side
    15,845.10x = 191,794,997.57
  5. Step 5: Solve for x
    x = 191,794,997.57/15,845.10
  6. Step 6: Final answer
    x = 12,104.37

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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.