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Finding the Fourth Proportional to 12,859.85, 17,739.44 and 7,481.68

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Solution

The fourth proportional to 12,859.85, 17,739.44 and 7,481.68 is: 10,320.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,859.85 : 17,739.44 = 7,481.68 : x
  2. Step 2: Convert to fraction form
    12,859.85/17,739.44 = 7,481.68/x
  3. Step 3: Cross multiply
    12,859.85x = 17,739.44 × 7,481.68
  4. Step 4: Simplify right side
    12,859.85x = 132,720,813.46
  5. Step 5: Solve for x
    x = 132,720,813.46/12,859.85
  6. Step 6: Final answer
    x = 10,320.56

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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.