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Finding the Fourth Proportional to 12,645.35, 17,446.81 and 8,165.01

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Solution

The fourth proportional to 12,645.35, 17,446.81 and 8,165.01 is: 11,265.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,645.35 : 17,446.81 = 8,165.01 : x
  2. Step 2: Convert to fraction form
    12,645.35/17,446.81 = 8,165.01/x
  3. Step 3: Cross multiply
    12,645.35x = 17,446.81 × 8,165.01
  4. Step 4: Simplify right side
    12,645.35x = 142,453,378.12
  5. Step 5: Solve for x
    x = 142,453,378.12/12,645.35
  6. Step 6: Final answer
    x = 11,265.28

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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.