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Finding the Fourth Proportional to 18,991.24, 26,215.18 and 16,998.24

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Solution

The fourth proportional to 18,991.24, 26,215.18 and 16,998.24 is: 23,464.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.24 : 26,215.18 = 16,998.24 : x
  2. Step 2: Convert to fraction form
    18,991.24/26,215.18 = 16,998.24/x
  3. Step 3: Cross multiply
    18,991.24x = 26,215.18 × 16,998.24
  4. Step 4: Simplify right side
    18,991.24x = 445,611,921.28
  5. Step 5: Solve for x
    x = 445,611,921.28/18,991.24
  6. Step 6: Final answer
    x = 23,464.08

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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.