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Finding the Fourth Proportional to 28,997.76, 43,503.92 and 8,221.26

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Solution

The fourth proportional to 28,997.76, 43,503.92 and 8,221.26 is: 12,333.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,997.76 : 43,503.92 = 8,221.26 : x
  2. Step 2: Convert to fraction form
    28,997.76/43,503.92 = 8,221.26/x
  3. Step 3: Cross multiply
    28,997.76x = 43,503.92 × 8,221.26
  4. Step 4: Simplify right side
    28,997.76x = 357,657,037.34
  5. Step 5: Solve for x
    x = 357,657,037.34/28,997.76
  6. Step 6: Final answer
    x = 12,333.95

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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.