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Finding the Fourth Proportional to 12,643.41, 18,965.15 and 4,329.43

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Solution

The fourth proportional to 12,643.41, 18,965.15 and 4,329.43 is: 6,494.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,643.41 : 18,965.15 = 4,329.43 : x
  2. Step 2: Convert to fraction form
    12,643.41/18,965.15 = 4,329.43/x
  3. Step 3: Cross multiply
    12,643.41x = 18,965.15 × 4,329.43
  4. Step 4: Simplify right side
    12,643.41x = 82,108,300.19
  5. Step 5: Solve for x
    x = 82,108,300.19/12,643.41
  6. Step 6: Final answer
    x = 6,494.16

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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.