Home / 7,738.09-10,687.35-5,215.85

Finding the Fourth Proportional to 7,738.09, 10,687.35 and 5,215.85

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Solution

The fourth proportional to 7,738.09, 10,687.35 and 5,215.85 is: 7,203.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,738.09 : 10,687.35 = 5,215.85 : x
  2. Step 2: Convert to fraction form
    7,738.09/10,687.35 = 5,215.85/x
  3. Step 3: Cross multiply
    7,738.09x = 10,687.35 × 5,215.85
  4. Step 4: Simplify right side
    7,738.09x = 55,743,561.06
  5. Step 5: Solve for x
    x = 55,743,561.06/7,738.09
  6. Step 6: Final answer
    x = 7,203.79

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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.