Home / 21,690.66-32,513.83-12,310.88

Finding the Fourth Proportional to 21,690.66, 32,513.83 and 12,310.88

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Solution

The fourth proportional to 21,690.66, 32,513.83 and 12,310.88 is: 18,453.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,690.66 : 32,513.83 = 12,310.88 : x
  2. Step 2: Convert to fraction form
    21,690.66/32,513.83 = 12,310.88/x
  3. Step 3: Cross multiply
    21,690.66x = 32,513.83 × 12,310.88
  4. Step 4: Simplify right side
    21,690.66x = 400,273,859.47
  5. Step 5: Solve for x
    x = 400,273,859.47/21,690.66
  6. Step 6: Final answer
    x = 18,453.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.