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Finding the Fourth Proportional to 27,645, 38,136.96 and 18,695.64

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Solution

The fourth proportional to 27,645, 38,136.96 and 18,695.64 is: 25,791.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,645 : 38,136.96 = 18,695.64 : x
  2. Step 2: Convert to fraction form
    27,645/38,136.96 = 18,695.64/x
  3. Step 3: Cross multiply
    27,645x = 38,136.96 × 18,695.64
  4. Step 4: Simplify right side
    27,645x = 712,994,874.85
  5. Step 5: Solve for x
    x = 712,994,874.85/27,645
  6. Step 6: Final answer
    x = 25,791.10

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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.