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Finding the Fourth Proportional to 25,669.80, 38,504.70 and 18,694.20

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Solution

The fourth proportional to 25,669.80, 38,504.70 and 18,694.20 is: 28,041.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,669.80 : 38,504.70 = 18,694.20 : x
  2. Step 2: Convert to fraction form
    25,669.80/38,504.70 = 18,694.20/x
  3. Step 3: Cross multiply
    25,669.80x = 38,504.70 × 18,694.20
  4. Step 4: Simplify right side
    25,669.80x = 719,814,562.74
  5. Step 5: Solve for x
    x = 719,814,562.74/25,669.80
  6. Step 6: Final answer
    x = 28,041.30

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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.