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Finding the Fourth Proportional to 12,769.22, 17,606.99 and 8,991.18

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Solution

The fourth proportional to 12,769.22, 17,606.99 and 8,991.18 is: 12,397.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,769.22 : 17,606.99 = 8,991.18 : x
  2. Step 2: Convert to fraction form
    12,769.22/17,606.99 = 8,991.18/x
  3. Step 3: Cross multiply
    12,769.22x = 17,606.99 × 8,991.18
  4. Step 4: Simplify right side
    12,769.22x = 158,307,616.35
  5. Step 5: Solve for x
    x = 158,307,616.35/12,769.22
  6. Step 6: Final answer
    x = 12,397.59

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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.