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Finding the Fourth Proportional to 20,561.20, 30,834.60 and 10,697.20

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Solution

The fourth proportional to 20,561.20, 30,834.60 and 10,697.20 is: 16,042.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.20 : 30,834.60 = 10,697.20 : x
  2. Step 2: Convert to fraction form
    20,561.20/30,834.60 = 10,697.20/x
  3. Step 3: Cross multiply
    20,561.20x = 30,834.60 × 10,697.20
  4. Step 4: Simplify right side
    20,561.20x = 329,843,883.12
  5. Step 5: Solve for x
    x = 329,843,883.12/20,561.20
  6. Step 6: Final answer
    x = 16,042.05

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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.