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Finding the Fourth Proportional to 18,415.20, 27,622.80 and 16,276.80

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Solution

The fourth proportional to 18,415.20, 27,622.80 and 16,276.80 is: 24,415.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,415.20 : 27,622.80 = 16,276.80 : x
  2. Step 2: Convert to fraction form
    18,415.20/27,622.80 = 16,276.80/x
  3. Step 3: Cross multiply
    18,415.20x = 27,622.80 × 16,276.80
  4. Step 4: Simplify right side
    18,415.20x = 449,610,791.04
  5. Step 5: Solve for x
    x = 449,610,791.04/18,415.20
  6. Step 6: Final answer
    x = 24,415.20

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1.5x scale

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.