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Finding the Fourth Proportional to 20,357.70, 30,693.54 and 20,231.34

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Solution

The fourth proportional to 20,357.70, 30,693.54 and 20,231.34 is: 30,503.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,357.70 : 30,693.54 = 20,231.34 : x
  2. Step 2: Convert to fraction form
    20,357.70/30,693.54 = 20,231.34/x
  3. Step 3: Cross multiply
    20,357.70x = 30,693.54 × 20,231.34
  4. Step 4: Simplify right side
    20,357.70x = 620,971,443.54
  5. Step 5: Solve for x
    x = 620,971,443.54/20,357.70
  6. Step 6: Final answer
    x = 30,503.03

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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.