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Finding the Fourth Proportional to 28,812, 39,760.72 and 16,236.96

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Solution

The fourth proportional to 28,812, 39,760.72 and 16,236.96 is: 22,407.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,812 : 39,760.72 = 16,236.96 : x
  2. Step 2: Convert to fraction form
    28,812/39,760.72 = 16,236.96/x
  3. Step 3: Cross multiply
    28,812x = 39,760.72 × 16,236.96
  4. Step 4: Simplify right side
    28,812x = 645,593,220.21
  5. Step 5: Solve for x
    x = 645,593,220.21/28,812
  6. Step 6: Final answer
    x = 22,407.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.