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Finding the Fourth Proportional to 13,757.78, 18,976.02 and 8,455.52

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Solution

The fourth proportional to 13,757.78, 18,976.02 and 8,455.52 is: 11,662.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,757.78 : 18,976.02 = 8,455.52 : x
  2. Step 2: Convert to fraction form
    13,757.78/18,976.02 = 8,455.52/x
  3. Step 3: Cross multiply
    13,757.78x = 18,976.02 × 8,455.52
  4. Step 4: Simplify right side
    13,757.78x = 160,452,116.63
  5. Step 5: Solve for x
    x = 160,452,116.63/13,757.78
  6. Step 6: Final answer
    x = 11,662.65

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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.