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Finding the Fourth Proportional to 20,615.85, 30,965.20 and 20,034.47

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Solution

The fourth proportional to 20,615.85, 30,965.20 and 20,034.47 is: 30,091.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.85 : 30,965.20 = 20,034.47 : x
  2. Step 2: Convert to fraction form
    20,615.85/30,965.20 = 20,034.47/x
  3. Step 3: Cross multiply
    20,615.85x = 30,965.20 × 20,034.47
  4. Step 4: Simplify right side
    20,615.85x = 620,371,397.77
  5. Step 5: Solve for x
    x = 620,371,397.77/20,615.85
  6. Step 6: Final answer
    x = 30,091.96

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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.