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Finding the Fourth Proportional to 20,613.68, 30,922.72 and 6,762.72

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Solution

The fourth proportional to 20,613.68, 30,922.72 and 6,762.72 is: 10,144.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.68 : 30,922.72 = 6,762.72 : x
  2. Step 2: Convert to fraction form
    20,613.68/30,922.72 = 6,762.72/x
  3. Step 3: Cross multiply
    20,613.68x = 30,922.72 × 6,762.72
  4. Step 4: Simplify right side
    20,613.68x = 209,121,697.00
  5. Step 5: Solve for x
    x = 209,121,697.00/20,613.68
  6. Step 6: Final answer
    x = 10,144.80

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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.