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Finding the Fourth Proportional to 45,943.92, 68,920.64 and 12,663.99

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Solution

The fourth proportional to 45,943.92, 68,920.64 and 12,663.99 is: 18,997.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,943.92 : 68,920.64 = 12,663.99 : x
  2. Step 2: Convert to fraction form
    45,943.92/68,920.64 = 12,663.99/x
  3. Step 3: Cross multiply
    45,943.92x = 68,920.64 × 12,663.99
  4. Step 4: Simplify right side
    45,943.92x = 872,810,327.41
  5. Step 5: Solve for x
    x = 872,810,327.41/45,943.92
  6. Step 6: Final answer
    x = 18,997.30

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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.