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Finding the Fourth Proportional to 13,695.60, 18,908.01 and 8,664.24

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Solution

The fourth proportional to 13,695.60, 18,908.01 and 8,664.24 is: 11,961.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,695.60 : 18,908.01 = 8,664.24 : x
  2. Step 2: Convert to fraction form
    13,695.60/18,908.01 = 8,664.24/x
  3. Step 3: Cross multiply
    13,695.60x = 18,908.01 × 8,664.24
  4. Step 4: Simplify right side
    13,695.60x = 163,823,536.56
  5. Step 5: Solve for x
    x = 163,823,536.56/13,695.60
  6. Step 6: Final answer
    x = 11,961.76

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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.