Home / 20,109.20-30,192.60-15,731.60

Finding the Fourth Proportional to 20,109.20, 30,192.60 and 15,731.60

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Solution

The fourth proportional to 20,109.20, 30,192.60 and 15,731.60 is: 23,619.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,109.20 : 30,192.60 = 15,731.60 : x
  2. Step 2: Convert to fraction form
    20,109.20/30,192.60 = 15,731.60/x
  3. Step 3: Cross multiply
    20,109.20x = 30,192.60 × 15,731.60
  4. Step 4: Simplify right side
    20,109.20x = 474,977,906.16
  5. Step 5: Solve for x
    x = 474,977,906.16/20,109.20
  6. Step 6: Final answer
    x = 23,619.93

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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.