Home / 12,493.25-17,220.64-8,458.79

Finding the Fourth Proportional to 12,493.25, 17,220.64 and 8,458.79

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Solution

The fourth proportional to 12,493.25, 17,220.64 and 8,458.79 is: 11,659.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,493.25 : 17,220.64 = 8,458.79 : x
  2. Step 2: Convert to fraction form
    12,493.25/17,220.64 = 8,458.79/x
  3. Step 3: Cross multiply
    12,493.25x = 17,220.64 × 8,458.79
  4. Step 4: Simplify right side
    12,493.25x = 145,665,777.43
  5. Step 5: Solve for x
    x = 145,665,777.43/12,493.25
  6. Step 6: Final answer
    x = 11,659.56

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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.