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Finding the Fourth Proportional to 13,662.96, 18,840.96 and 11,424.48

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Solution

The fourth proportional to 13,662.96, 18,840.96 and 11,424.48 is: 15,754.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,662.96 : 18,840.96 = 11,424.48 : x
  2. Step 2: Convert to fraction form
    13,662.96/18,840.96 = 11,424.48/x
  3. Step 3: Cross multiply
    13,662.96x = 18,840.96 × 11,424.48
  4. Step 4: Simplify right side
    13,662.96x = 215,248,170.70
  5. Step 5: Solve for x
    x = 215,248,170.70/13,662.96
  6. Step 6: Final answer
    x = 15,754.14

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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.