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Finding the Fourth Proportional to 14,787.52, 20,406.52 and 8,072.96

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Solution

The fourth proportional to 14,787.52, 20,406.52 and 8,072.96 is: 11,140.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,787.52 : 20,406.52 = 8,072.96 : x
  2. Step 2: Convert to fraction form
    14,787.52/20,406.52 = 8,072.96/x
  3. Step 3: Cross multiply
    14,787.52x = 20,406.52 × 8,072.96
  4. Step 4: Simplify right side
    14,787.52x = 164,741,019.70
  5. Step 5: Solve for x
    x = 164,741,019.70/14,787.52
  6. Step 6: Final answer
    x = 11,140.54

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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.