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Finding the Fourth Proportional to 40,689, 61,056.54 and 18,801

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Solution

The fourth proportional to 40,689, 61,056.54 and 18,801 is: 28,212.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,689 : 61,056.54 = 18,801 : x
  2. Step 2: Convert to fraction form
    40,689/61,056.54 = 18,801/x
  3. Step 3: Cross multiply
    40,689x = 61,056.54 × 18,801
  4. Step 4: Simplify right side
    40,689x = 1,147,924,008.54
  5. Step 5: Solve for x
    x = 1,147,924,008.54/40,689
  6. Step 6: Final answer
    x = 28,212.15

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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.