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Finding the Fourth Proportional to 14,991.31, 20,687.67 and 8,185.10

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Solution

The fourth proportional to 14,991.31, 20,687.67 and 8,185.10 is: 11,295.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,991.31 : 20,687.67 = 8,185.10 : x
  2. Step 2: Convert to fraction form
    14,991.31/20,687.67 = 8,185.10/x
  3. Step 3: Cross multiply
    14,991.31x = 20,687.67 × 8,185.10
  4. Step 4: Simplify right side
    14,991.31x = 169,330,544.28
  5. Step 5: Solve for x
    x = 169,330,544.28/14,991.31
  6. Step 6: Final answer
    x = 11,295.25

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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.