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Finding the Fourth Proportional to 13,892.78, 19,175.02 and 8,855.80

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Solution

The fourth proportional to 13,892.78, 19,175.02 and 8,855.80 is: 12,222.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,892.78 : 19,175.02 = 8,855.80 : x
  2. Step 2: Convert to fraction form
    13,892.78/19,175.02 = 8,855.80/x
  3. Step 3: Cross multiply
    13,892.78x = 19,175.02 × 8,855.80
  4. Step 4: Simplify right side
    13,892.78x = 169,810,142.12
  5. Step 5: Solve for x
    x = 169,810,142.12/13,892.78
  6. Step 6: Final answer
    x = 12,222.91

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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.