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Finding the Fourth Proportional to 18,754.92, 28,146.06 and 13,837.80

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Solution

The fourth proportional to 18,754.92, 28,146.06 and 13,837.80 is: 20,766.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,754.92 : 28,146.06 = 13,837.80 : x
  2. Step 2: Convert to fraction form
    18,754.92/28,146.06 = 13,837.80/x
  3. Step 3: Cross multiply
    18,754.92x = 28,146.06 × 13,837.80
  4. Step 4: Simplify right side
    18,754.92x = 389,479,549.07
  5. Step 5: Solve for x
    x = 389,479,549.07/18,754.92
  6. Step 6: Final answer
    x = 20,766.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.