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Finding the Fourth Proportional to 20,150.40, 30,189.15 and 17,234.40

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Solution

The fourth proportional to 20,150.40, 30,189.15 and 17,234.40 is: 25,820.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,150.40 : 30,189.15 = 17,234.40 : x
  2. Step 2: Convert to fraction form
    20,150.40/30,189.15 = 17,234.40/x
  3. Step 3: Cross multiply
    20,150.40x = 30,189.15 × 17,234.40
  4. Step 4: Simplify right side
    20,150.40x = 520,291,886.76
  5. Step 5: Solve for x
    x = 520,291,886.76/20,150.40
  6. Step 6: Final answer
    x = 25,820.42

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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.