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Finding the Fourth Proportional to 12,697.09, 17,523.92 and 7,917.81

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Solution

The fourth proportional to 12,697.09, 17,523.92 and 7,917.81 is: 10,927.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,697.09 : 17,523.92 = 7,917.81 : x
  2. Step 2: Convert to fraction form
    12,697.09/17,523.92 = 7,917.81/x
  3. Step 3: Cross multiply
    12,697.09x = 17,523.92 × 7,917.81
  4. Step 4: Simplify right side
    12,697.09x = 138,751,069.02
  5. Step 5: Solve for x
    x = 138,751,069.02/12,697.09
  6. Step 6: Final answer
    x = 10,927.78

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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.