Home / 12,739.94-17,581.56-7,074.78

Finding the Fourth Proportional to 12,739.94, 17,581.56 and 7,074.78

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Solution

The fourth proportional to 12,739.94, 17,581.56 and 7,074.78 is: 9,763.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,739.94 : 17,581.56 = 7,074.78 : x
  2. Step 2: Convert to fraction form
    12,739.94/17,581.56 = 7,074.78/x
  3. Step 3: Cross multiply
    12,739.94x = 17,581.56 × 7,074.78
  4. Step 4: Simplify right side
    12,739.94x = 124,385,633.68
  5. Step 5: Solve for x
    x = 124,385,633.68/12,739.94
  6. Step 6: Final answer
    x = 9,763.44

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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.