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Finding the Fourth Proportional to 20,605.20, 30,900.60 and 10,741.20

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Solution

The fourth proportional to 20,605.20, 30,900.60 and 10,741.20 is: 16,108.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,605.20 : 30,900.60 = 10,741.20 : x
  2. Step 2: Convert to fraction form
    20,605.20/30,900.60 = 10,741.20/x
  3. Step 3: Cross multiply
    20,605.20x = 30,900.60 × 10,741.20
  4. Step 4: Simplify right side
    20,605.20x = 331,909,524.72
  5. Step 5: Solve for x
    x = 331,909,524.72/20,605.20
  6. Step 6: Final answer
    x = 16,108.05

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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.