Home / 7,768.60-10,720.64-4,231.72

Finding the Fourth Proportional to 7,768.60, 10,720.64 and 4,231.72

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Solution

The fourth proportional to 7,768.60, 10,720.64 and 4,231.72 is: 5,839.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,768.60 : 10,720.64 = 4,231.72 : x
  2. Step 2: Convert to fraction form
    7,768.60/10,720.64 = 4,231.72/x
  3. Step 3: Cross multiply
    7,768.60x = 10,720.64 × 4,231.72
  4. Step 4: Simplify right side
    7,768.60x = 45,366,746.70
  5. Step 5: Solve for x
    x = 45,366,746.70/7,768.60
  6. Step 6: Final answer
    x = 5,839.76

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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.