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Finding the Fourth Proportional to 7,963.30, 11,930.55 and 6,811.30

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Solution

The fourth proportional to 7,963.30, 11,930.55 and 6,811.30 is: 10,204.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,963.30 : 11,930.55 = 6,811.30 : x
  2. Step 2: Convert to fraction form
    7,963.30/11,930.55 = 6,811.30/x
  3. Step 3: Cross multiply
    7,963.30x = 11,930.55 × 6,811.30
  4. Step 4: Simplify right side
    7,963.30x = 81,262,555.22
  5. Step 5: Solve for x
    x = 81,262,555.22/7,963.30
  6. Step 6: Final answer
    x = 10,204.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.