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Finding the Fourth Proportional to 18,772.64, 28,166.82 and 8,237.22

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Solution

The fourth proportional to 18,772.64, 28,166.82 and 8,237.22 is: 12,359.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.64 : 28,166.82 = 8,237.22 : x
  2. Step 2: Convert to fraction form
    18,772.64/28,166.82 = 8,237.22/x
  3. Step 3: Cross multiply
    18,772.64x = 28,166.82 × 8,237.22
  4. Step 4: Simplify right side
    18,772.64x = 232,016,293.04
  5. Step 5: Solve for x
    x = 232,016,293.04/18,772.64
  6. Step 6: Final answer
    x = 12,359.28

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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.