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Finding the Fourth Proportional to 18,674.10, 28,016.28 and 9,790.02

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Solution

The fourth proportional to 18,674.10, 28,016.28 and 9,790.02 is: 14,687.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,674.10 : 28,016.28 = 9,790.02 : x
  2. Step 2: Convert to fraction form
    18,674.10/28,016.28 = 9,790.02/x
  3. Step 3: Cross multiply
    18,674.10x = 28,016.28 × 9,790.02
  4. Step 4: Simplify right side
    18,674.10x = 274,279,941.53
  5. Step 5: Solve for x
    x = 274,279,941.53/18,674.10
  6. Step 6: Final answer
    x = 14,687.72

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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.