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Finding the Fourth Proportional to 15,066.50, 20,791.77 and 8,780.09

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Solution

The fourth proportional to 15,066.50, 20,791.77 and 8,780.09 is: 12,116.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,066.50 : 20,791.77 = 8,780.09 : x
  2. Step 2: Convert to fraction form
    15,066.50/20,791.77 = 8,780.09/x
  3. Step 3: Cross multiply
    15,066.50x = 20,791.77 × 8,780.09
  4. Step 4: Simplify right side
    15,066.50x = 182,553,611.86
  5. Step 5: Solve for x
    x = 182,553,611.86/15,066.50
  6. Step 6: Final answer
    x = 12,116.52

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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.