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Finding the Fourth Proportional to 18,532.80, 27,820.80 and 11,145.60

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Solution

The fourth proportional to 18,532.80, 27,820.80 and 11,145.60 is: 16,731.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,532.80 : 27,820.80 = 11,145.60 : x
  2. Step 2: Convert to fraction form
    18,532.80/27,820.80 = 11,145.60/x
  3. Step 3: Cross multiply
    18,532.80x = 27,820.80 × 11,145.60
  4. Step 4: Simplify right side
    18,532.80x = 310,079,508.48
  5. Step 5: Solve for x
    x = 310,079,508.48/18,532.80
  6. Step 6: Final answer
    x = 16,731.39

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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.