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Finding the Fourth Proportional to 18,659.98, 28,003.95 and 8,806.19

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Solution

The fourth proportional to 18,659.98, 28,003.95 and 8,806.19 is: 13,215.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,659.98 : 28,003.95 = 8,806.19 : x
  2. Step 2: Convert to fraction form
    18,659.98/28,003.95 = 8,806.19/x
  3. Step 3: Cross multiply
    18,659.98x = 28,003.95 × 8,806.19
  4. Step 4: Simplify right side
    18,659.98x = 246,607,964.43
  5. Step 5: Solve for x
    x = 246,607,964.43/18,659.98
  6. Step 6: Final answer
    x = 13,215.87

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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.