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Finding the Fourth Proportional to 11,693.59, 16,137.14 and 6,388.40

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Solution

The fourth proportional to 11,693.59, 16,137.14 and 6,388.40 is: 8,815.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,693.59 : 16,137.14 = 6,388.40 : x
  2. Step 2: Convert to fraction form
    11,693.59/16,137.14 = 6,388.40/x
  3. Step 3: Cross multiply
    11,693.59x = 16,137.14 × 6,388.40
  4. Step 4: Simplify right side
    11,693.59x = 103,090,513.58
  5. Step 5: Solve for x
    x = 103,090,513.58/11,693.59
  6. Step 6: Final answer
    x = 8,815.99

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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.