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Finding the Fourth Proportional to 19,886.64, 27,443.64 and 11,388.92

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Solution

The fourth proportional to 19,886.64, 27,443.64 and 11,388.92 is: 15,716.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,886.64 : 27,443.64 = 11,388.92 : x
  2. Step 2: Convert to fraction form
    19,886.64/27,443.64 = 11,388.92/x
  3. Step 3: Cross multiply
    19,886.64x = 27,443.64 × 11,388.92
  4. Step 4: Simplify right side
    19,886.64x = 312,553,420.47
  5. Step 5: Solve for x
    x = 312,553,420.47/19,886.64
  6. Step 6: Final answer
    x = 15,716.75

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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.