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Finding the Fourth Proportional to 7,768.58, 10,720.58 and 4,231.79

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Solution

The fourth proportional to 7,768.58, 10,720.58 and 4,231.79 is: 5,839.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,768.58 : 10,720.58 = 4,231.79 : x
  2. Step 2: Convert to fraction form
    7,768.58/10,720.58 = 4,231.79/x
  3. Step 3: Cross multiply
    7,768.58x = 10,720.58 × 4,231.79
  4. Step 4: Simplify right side
    7,768.58x = 45,367,205.06
  5. Step 5: Solve for x
    x = 45,367,205.06/7,768.58
  6. Step 6: Final answer
    x = 5,839.84

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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.