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Finding the Fourth Proportional to 13,451.15, 18,554.91 and 8,072.15

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Solution

The fourth proportional to 13,451.15, 18,554.91 and 8,072.15 is: 11,134.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,451.15 : 18,554.91 = 8,072.15 : x
  2. Step 2: Convert to fraction form
    13,451.15/18,554.91 = 8,072.15/x
  3. Step 3: Cross multiply
    13,451.15x = 18,554.91 × 8,072.15
  4. Step 4: Simplify right side
    13,451.15x = 149,777,893.71
  5. Step 5: Solve for x
    x = 149,777,893.71/13,451.15
  6. Step 6: Final answer
    x = 11,134.95

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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.