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Finding the Fourth Proportional to 18,645.68, 27,972.64 and 6,169.60

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Solution

The fourth proportional to 18,645.68, 27,972.64 and 6,169.60 is: 9,255.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,645.68 : 27,972.64 = 6,169.60 : x
  2. Step 2: Convert to fraction form
    18,645.68/27,972.64 = 6,169.60/x
  3. Step 3: Cross multiply
    18,645.68x = 27,972.64 × 6,169.60
  4. Step 4: Simplify right side
    18,645.68x = 172,579,999.74
  5. Step 5: Solve for x
    x = 172,579,999.74/18,645.68
  6. Step 6: Final answer
    x = 9,255.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.