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Finding the Fourth Proportional to 12,693.71, 17,511.46 and 8,218.91

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Solution

The fourth proportional to 12,693.71, 17,511.46 and 8,218.91 is: 11,338.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,693.71 : 17,511.46 = 8,218.91 : x
  2. Step 2: Convert to fraction form
    12,693.71/17,511.46 = 8,218.91/x
  3. Step 3: Cross multiply
    12,693.71x = 17,511.46 × 8,218.91
  4. Step 4: Simplify right side
    12,693.71x = 143,925,136.94
  5. Step 5: Solve for x
    x = 143,925,136.94/12,693.71
  6. Step 6: Final answer
    x = 11,338.30

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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.