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Finding the Fourth Proportional to 18,772.72, 28,203.84 and 10,986.96

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Solution

The fourth proportional to 18,772.72, 28,203.84 and 10,986.96 is: 16,506.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,772.72 : 28,203.84 = 10,986.96 : x
  2. Step 2: Convert to fraction form
    18,772.72/28,203.84 = 10,986.96/x
  3. Step 3: Cross multiply
    18,772.72x = 28,203.84 × 10,986.96
  4. Step 4: Simplify right side
    18,772.72x = 309,874,461.93
  5. Step 5: Solve for x
    x = 309,874,461.93/18,772.72
  6. Step 6: Final answer
    x = 16,506.64

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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.