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Finding the Fourth Proportional to 19,921.96, 27,491.16 and 10,967.98

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Solution

The fourth proportional to 19,921.96, 27,491.16 and 10,967.98 is: 15,135.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,921.96 : 27,491.16 = 10,967.98 : x
  2. Step 2: Convert to fraction form
    19,921.96/27,491.16 = 10,967.98/x
  3. Step 3: Cross multiply
    19,921.96x = 27,491.16 × 10,967.98
  4. Step 4: Simplify right side
    19,921.96x = 301,522,493.06
  5. Step 5: Solve for x
    x = 301,522,493.06/19,921.96
  6. Step 6: Final answer
    x = 15,135.18

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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.