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Finding the Fourth Proportional to 20,613.05, 30,922.02 and 7,283.28

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Solution

The fourth proportional to 20,613.05, 30,922.02 and 7,283.28 is: 10,925.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.05 : 30,922.02 = 7,283.28 : x
  2. Step 2: Convert to fraction form
    20,613.05/30,922.02 = 7,283.28/x
  3. Step 3: Cross multiply
    20,613.05x = 30,922.02 × 7,283.28
  4. Step 4: Simplify right side
    20,613.05x = 225,213,729.83
  5. Step 5: Solve for x
    x = 225,213,729.83/20,613.05
  6. Step 6: Final answer
    x = 10,925.79

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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.