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Finding the Fourth Proportional to 13,679.73, 18,878.03 and 7,392.11

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Solution

The fourth proportional to 13,679.73, 18,878.03 and 7,392.11 is: 10,201.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,679.73 : 18,878.03 = 7,392.11 : x
  2. Step 2: Convert to fraction form
    13,679.73/18,878.03 = 7,392.11/x
  3. Step 3: Cross multiply
    13,679.73x = 18,878.03 × 7,392.11
  4. Step 4: Simplify right side
    13,679.73x = 139,548,398.43
  5. Step 5: Solve for x
    x = 139,548,398.43/13,679.73
  6. Step 6: Final answer
    x = 10,201.11

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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.