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Finding the Fourth Proportional to 18,855.54, 26,020.80 and 11,786.13

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Solution

The fourth proportional to 18,855.54, 26,020.80 and 11,786.13 is: 16,264.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,855.54 : 26,020.80 = 11,786.13 : x
  2. Step 2: Convert to fraction form
    18,855.54/26,020.80 = 11,786.13/x
  3. Step 3: Cross multiply
    18,855.54x = 26,020.80 × 11,786.13
  4. Step 4: Simplify right side
    18,855.54x = 306,684,531.50
  5. Step 5: Solve for x
    x = 306,684,531.50/18,855.54
  6. Step 6: Final answer
    x = 16,264.96

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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.