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Finding the Fourth Proportional to 8,619.73, 12,940.54 and 7,329.40

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Solution

The fourth proportional to 8,619.73, 12,940.54 and 7,329.40 is: 11,003.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,619.73 : 12,940.54 = 7,329.40 : x
  2. Step 2: Convert to fraction form
    8,619.73/12,940.54 = 7,329.40/x
  3. Step 3: Cross multiply
    8,619.73x = 12,940.54 × 7,329.40
  4. Step 4: Simplify right side
    8,619.73x = 94,846,343.20
  5. Step 5: Solve for x
    x = 94,846,343.20/8,619.73
  6. Step 6: Final answer
    x = 11,003.40

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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.