Home / 20,370.80-30,556.20-17,090.30

Finding the Fourth Proportional to 20,370.80, 30,556.20 and 17,090.30

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Solution

The fourth proportional to 20,370.80, 30,556.20 and 17,090.30 is: 25,635.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,370.80 : 30,556.20 = 17,090.30 : x
  2. Step 2: Convert to fraction form
    20,370.80/30,556.20 = 17,090.30/x
  3. Step 3: Cross multiply
    20,370.80x = 30,556.20 × 17,090.30
  4. Step 4: Simplify right side
    20,370.80x = 522,214,624.86
  5. Step 5: Solve for x
    x = 522,214,624.86/20,370.80
  6. Step 6: Final answer
    x = 25,635.45

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Double scale
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Similar ratio
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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.