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Finding the Fourth Proportional to 8,465.72, 12,699.54 and 2,623.80

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Solution

The fourth proportional to 8,465.72, 12,699.54 and 2,623.80 is: 3,936.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,465.72 : 12,699.54 = 2,623.80 : x
  2. Step 2: Convert to fraction form
    8,465.72/12,699.54 = 2,623.80/x
  3. Step 3: Cross multiply
    8,465.72x = 12,699.54 × 2,623.80
  4. Step 4: Simplify right side
    8,465.72x = 33,321,053.05
  5. Step 5: Solve for x
    x = 33,321,053.05/8,465.72
  6. Step 6: Final answer
    x = 3,936.00

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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.