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Finding the Fourth Proportional to 13,892.84, 19,172.34 and 7,843.40

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Solution

The fourth proportional to 13,892.84, 19,172.34 and 7,843.40 is: 10,824.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,892.84 : 19,172.34 = 7,843.40 : x
  2. Step 2: Convert to fraction form
    13,892.84/19,172.34 = 7,843.40/x
  3. Step 3: Cross multiply
    13,892.84x = 19,172.34 × 7,843.40
  4. Step 4: Simplify right side
    13,892.84x = 150,376,379.49
  5. Step 5: Solve for x
    x = 150,376,379.49/13,892.84
  6. Step 6: Final answer
    x = 10,824.02

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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.