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Finding the Fourth Proportional to 14,990.81, 20,682.72 and 8,701.97

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Solution

The fourth proportional to 14,990.81, 20,682.72 and 8,701.97 is: 12,006.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,990.81 : 20,682.72 = 8,701.97 : x
  2. Step 2: Convert to fraction form
    14,990.81/20,682.72 = 8,701.97/x
  3. Step 3: Cross multiply
    14,990.81x = 20,682.72 × 8,701.97
  4. Step 4: Simplify right side
    14,990.81x = 179,980,305.54
  5. Step 5: Solve for x
    x = 179,980,305.54/14,990.81
  6. Step 6: Final answer
    x = 12,006.05

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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.