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Finding the Fourth Proportional to 20,262.52, 30,372.72 and 8,422.72

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Solution

The fourth proportional to 20,262.52, 30,372.72 and 8,422.72 is: 12,625.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,262.52 : 30,372.72 = 8,422.72 : x
  2. Step 2: Convert to fraction form
    20,262.52/30,372.72 = 8,422.72/x
  3. Step 3: Cross multiply
    20,262.52x = 30,372.72 × 8,422.72
  4. Step 4: Simplify right side
    20,262.52x = 255,820,984.19
  5. Step 5: Solve for x
    x = 255,820,984.19/20,262.52
  6. Step 6: Final answer
    x = 12,625.33

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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.