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Finding the Fourth Proportional to 13,493.64, 18,612.09 and 11,722.17

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Solution

The fourth proportional to 13,493.64, 18,612.09 and 11,722.17 is: 16,168.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,493.64 : 18,612.09 = 11,722.17 : x
  2. Step 2: Convert to fraction form
    13,493.64/18,612.09 = 11,722.17/x
  3. Step 3: Cross multiply
    13,493.64x = 18,612.09 × 11,722.17
  4. Step 4: Simplify right side
    13,493.64x = 218,174,083.04
  5. Step 5: Solve for x
    x = 218,174,083.04/13,493.64
  6. Step 6: Final answer
    x = 16,168.66

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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.