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Finding the Fourth Proportional to 13,663.76, 18,857.40 and 8,362.10

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Solution

The fourth proportional to 13,663.76, 18,857.40 and 8,362.10 is: 11,540.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,663.76 : 18,857.40 = 8,362.10 : x
  2. Step 2: Convert to fraction form
    13,663.76/18,857.40 = 8,362.10/x
  3. Step 3: Cross multiply
    13,663.76x = 18,857.40 × 8,362.10
  4. Step 4: Simplify right side
    13,663.76x = 157,687,464.54
  5. Step 5: Solve for x
    x = 157,687,464.54/13,663.76
  6. Step 6: Final answer
    x = 11,540.56

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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.