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Finding the Fourth Proportional to 19,920.52, 27,619.15 and 19,181.80

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Solution

The fourth proportional to 19,920.52, 27,619.15 and 19,181.80 is: 26,594.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,920.52 : 27,619.15 = 19,181.80 : x
  2. Step 2: Convert to fraction form
    19,920.52/27,619.15 = 19,181.80/x
  3. Step 3: Cross multiply
    19,920.52x = 27,619.15 × 19,181.80
  4. Step 4: Simplify right side
    19,920.52x = 529,785,011.47
  5. Step 5: Solve for x
    x = 529,785,011.47/19,920.52
  6. Step 6: Final answer
    x = 26,594.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.