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Finding the Fourth Proportional to 20,615.82, 30,919.84 and 8,767.40

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Solution

The fourth proportional to 20,615.82, 30,919.84 and 8,767.40 is: 13,149.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,615.82 : 30,919.84 = 8,767.40 : x
  2. Step 2: Convert to fraction form
    20,615.82/30,919.84 = 8,767.40/x
  3. Step 3: Cross multiply
    20,615.82x = 30,919.84 × 8,767.40
  4. Step 4: Simplify right side
    20,615.82x = 271,086,605.22
  5. Step 5: Solve for x
    x = 271,086,605.22/20,615.82
  6. Step 6: Final answer
    x = 13,149.45

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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.