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Finding the Fourth Proportional to 20,651.88, 30,962.15 and 10,645.85

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Solution

The fourth proportional to 20,651.88, 30,962.15 and 10,645.85 is: 15,960.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,651.88 : 30,962.15 = 10,645.85 : x
  2. Step 2: Convert to fraction form
    20,651.88/30,962.15 = 10,645.85/x
  3. Step 3: Cross multiply
    20,651.88x = 30,962.15 × 10,645.85
  4. Step 4: Simplify right side
    20,651.88x = 329,618,236.46
  5. Step 5: Solve for x
    x = 329,618,236.46/20,651.88
  6. Step 6: Final answer
    x = 15,960.69

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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.