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Finding the Fourth Proportional to 12,999.39, 17,930.90 and 8,523.43

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Solution

The fourth proportional to 12,999.39, 17,930.90 and 8,523.43 is: 11,756.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999.39 : 17,930.90 = 8,523.43 : x
  2. Step 2: Convert to fraction form
    12,999.39/17,930.90 = 8,523.43/x
  3. Step 3: Cross multiply
    12,999.39x = 17,930.90 × 8,523.43
  4. Step 4: Simplify right side
    12,999.39x = 152,832,770.99
  5. Step 5: Solve for x
    x = 152,832,770.99/12,999.39
  6. Step 6: Final answer
    x = 11,756.92

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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.