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Finding the Fourth Proportional to 18,648.31, 27,968.71 and 9,156.64

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Solution

The fourth proportional to 18,648.31, 27,968.71 and 9,156.64 is: 13,733.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,648.31 : 27,968.71 = 9,156.64 : x
  2. Step 2: Convert to fraction form
    18,648.31/27,968.71 = 9,156.64/x
  3. Step 3: Cross multiply
    18,648.31x = 27,968.71 × 9,156.64
  4. Step 4: Simplify right side
    18,648.31x = 256,099,408.73
  5. Step 5: Solve for x
    x = 256,099,408.73/18,648.31
  6. Step 6: Final answer
    x = 13,733.12

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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.