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Finding the Fourth Proportional to 18,963.35, 28,481.94 and 15,455.95

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Solution

The fourth proportional to 18,963.35, 28,481.94 and 15,455.95 is: 23,214.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,963.35 : 28,481.94 = 15,455.95 : x
  2. Step 2: Convert to fraction form
    18,963.35/28,481.94 = 15,455.95/x
  3. Step 3: Cross multiply
    18,963.35x = 28,481.94 × 15,455.95
  4. Step 4: Simplify right side
    18,963.35x = 440,215,476.15
  5. Step 5: Solve for x
    x = 440,215,476.15/18,963.35
  6. Step 6: Final answer
    x = 23,214.01

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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.