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Finding the Fourth Proportional to 20,466.76, 30,648.30 and 12,651.88

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Solution

The fourth proportional to 20,466.76, 30,648.30 and 12,651.88 is: 18,945.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,466.76 : 30,648.30 = 12,651.88 : x
  2. Step 2: Convert to fraction form
    20,466.76/30,648.30 = 12,651.88/x
  3. Step 3: Cross multiply
    20,466.76x = 30,648.30 × 12,651.88
  4. Step 4: Simplify right side
    20,466.76x = 387,758,613.80
  5. Step 5: Solve for x
    x = 387,758,613.80/20,466.76
  6. Step 6: Final answer
    x = 18,945.77

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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.