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Finding the Fourth Proportional to 20,357.44, 30,693.10 and 20,231.08

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Solution

The fourth proportional to 20,357.44, 30,693.10 and 20,231.08 is: 30,502.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,357.44 : 30,693.10 = 20,231.08 : x
  2. Step 2: Convert to fraction form
    20,357.44/30,693.10 = 20,231.08/x
  3. Step 3: Cross multiply
    20,357.44x = 30,693.10 × 20,231.08
  4. Step 4: Simplify right side
    20,357.44x = 620,954,561.55
  5. Step 5: Solve for x
    x = 620,954,561.55/20,357.44
  6. Step 6: Final answer
    x = 30,502.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.