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Finding the Fourth Proportional to 28,919.80, 43,331.10 and 14,096.80

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Solution

The fourth proportional to 28,919.80, 43,331.10 and 14,096.80 is: 21,121.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,919.80 : 43,331.10 = 14,096.80 : x
  2. Step 2: Convert to fraction form
    28,919.80/43,331.10 = 14,096.80/x
  3. Step 3: Cross multiply
    28,919.80x = 43,331.10 × 14,096.80
  4. Step 4: Simplify right side
    28,919.80x = 610,829,850.48
  5. Step 5: Solve for x
    x = 610,829,850.48/28,919.80
  6. Step 6: Final answer
    x = 21,121.51

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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.