Home / 18,983.20-28,499.10-10,105.60

Finding the Fourth Proportional to 18,983.20, 28,499.10 and 10,105.60

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Solution

The fourth proportional to 18,983.20, 28,499.10 and 10,105.60 is: 15,171.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,983.20 : 28,499.10 = 10,105.60 : x
  2. Step 2: Convert to fraction form
    18,983.20/28,499.10 = 10,105.60/x
  3. Step 3: Cross multiply
    18,983.20x = 28,499.10 × 10,105.60
  4. Step 4: Simplify right side
    18,983.20x = 288,000,504.96
  5. Step 5: Solve for x
    x = 288,000,504.96/18,983.20
  6. Step 6: Final answer
    x = 15,171.34

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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.