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Finding the Fourth Proportional to 12,790.91, 17,646.44 and 8,008.87

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Solution

The fourth proportional to 12,790.91, 17,646.44 and 8,008.87 is: 11,049.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,790.91 : 17,646.44 = 8,008.87 : x
  2. Step 2: Convert to fraction form
    12,790.91/17,646.44 = 8,008.87/x
  3. Step 3: Cross multiply
    12,790.91x = 17,646.44 × 8,008.87
  4. Step 4: Simplify right side
    12,790.91x = 141,328,043.92
  5. Step 5: Solve for x
    x = 141,328,043.92/12,790.91
  6. Step 6: Final answer
    x = 11,049.10

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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.