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Finding the Fourth Proportional to 19,866.87, 27,393.84 and 14,479.79

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Solution

The fourth proportional to 19,866.87, 27,393.84 and 14,479.79 is: 19,965.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,866.87 : 27,393.84 = 14,479.79 : x
  2. Step 2: Convert to fraction form
    19,866.87/27,393.84 = 14,479.79/x
  3. Step 3: Cross multiply
    19,866.87x = 27,393.84 × 14,479.79
  4. Step 4: Simplify right side
    19,866.87x = 396,656,913.52
  5. Step 5: Solve for x
    x = 396,656,913.52/19,866.87
  6. Step 6: Final answer
    x = 19,965.75

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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.