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Finding the Fourth Proportional to 39,891, 55,056.96 and 23,124

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Solution

The fourth proportional to 39,891, 55,056.96 and 23,124 is: 31,915.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,891 : 55,056.96 = 23,124 : x
  2. Step 2: Convert to fraction form
    39,891/55,056.96 = 23,124/x
  3. Step 3: Cross multiply
    39,891x = 55,056.96 × 23,124
  4. Step 4: Simplify right side
    39,891x = 1,273,137,143.04
  5. Step 5: Solve for x
    x = 1,273,137,143.04/39,891
  6. Step 6: Final answer
    x = 31,915.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.