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Finding the Fourth Proportional to 18,645.60, 27,957.23 and 12,649.04

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Solution

The fourth proportional to 18,645.60, 27,957.23 and 12,649.04 is: 18,965.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,645.60 : 27,957.23 = 12,649.04 : x
  2. Step 2: Convert to fraction form
    18,645.60/27,957.23 = 12,649.04/x
  3. Step 3: Cross multiply
    18,645.60x = 27,957.23 × 12,649.04
  4. Step 4: Simplify right side
    18,645.60x = 353,632,120.56
  5. Step 5: Solve for x
    x = 353,632,120.56/18,645.60
  6. Step 6: Final answer
    x = 18,965.98

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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.