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Finding the Fourth Proportional to 18,998.34, 26,220.90 and 12,863.26

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Solution

The fourth proportional to 18,998.34, 26,220.90 and 12,863.26 is: 17,753.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.34 : 26,220.90 = 12,863.26 : x
  2. Step 2: Convert to fraction form
    18,998.34/26,220.90 = 12,863.26/x
  3. Step 3: Cross multiply
    18,998.34x = 26,220.90 × 12,863.26
  4. Step 4: Simplify right side
    18,998.34x = 337,286,238.05
  5. Step 5: Solve for x
    x = 337,286,238.05/18,998.34
  6. Step 6: Final answer
    x = 17,753.46

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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.