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Finding the Fourth Proportional to 38,459.80, 57,695.10 and 12,161.80

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Solution

The fourth proportional to 38,459.80, 57,695.10 and 12,161.80 is: 18,244.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,459.80 : 57,695.10 = 12,161.80 : x
  2. Step 2: Convert to fraction form
    38,459.80/57,695.10 = 12,161.80/x
  3. Step 3: Cross multiply
    38,459.80x = 57,695.10 × 12,161.80
  4. Step 4: Simplify right side
    38,459.80x = 701,676,267.18
  5. Step 5: Solve for x
    x = 701,676,267.18/38,459.80
  6. Step 6: Final answer
    x = 18,244.41

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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.