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Finding the Fourth Proportional to 12,933.66, 17,855.56 and 8,690.88

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Solution

The fourth proportional to 12,933.66, 17,855.56 and 8,690.88 is: 11,998.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,933.66 : 17,855.56 = 8,690.88 : x
  2. Step 2: Convert to fraction form
    12,933.66/17,855.56 = 8,690.88/x
  3. Step 3: Cross multiply
    12,933.66x = 17,855.56 × 8,690.88
  4. Step 4: Simplify right side
    12,933.66x = 155,180,529.29
  5. Step 5: Solve for x
    x = 155,180,529.29/12,933.66
  6. Step 6: Final answer
    x = 11,998.19

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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.