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Finding the Fourth Proportional to 14,991.50, 20,689.08 and 8,277.11

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Solution

The fourth proportional to 14,991.50, 20,689.08 and 8,277.11 is: 11,422.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,991.50 : 20,689.08 = 8,277.11 : x
  2. Step 2: Convert to fraction form
    14,991.50/20,689.08 = 8,277.11/x
  3. Step 3: Cross multiply
    14,991.50x = 20,689.08 × 8,277.11
  4. Step 4: Simplify right side
    14,991.50x = 171,245,796.14
  5. Step 5: Solve for x
    x = 171,245,796.14/14,991.50
  6. Step 6: Final answer
    x = 11,422.86

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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.