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Finding the Fourth Proportional to 19,563.12, 26,998.92 and 11,178

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Solution

The fourth proportional to 19,563.12, 26,998.92 and 11,178 is: 15,426.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,563.12 : 26,998.92 = 11,178 : x
  2. Step 2: Convert to fraction form
    19,563.12/26,998.92 = 11,178/x
  3. Step 3: Cross multiply
    19,563.12x = 26,998.92 × 11,178
  4. Step 4: Simplify right side
    19,563.12x = 301,793,927.76
  5. Step 5: Solve for x
    x = 301,793,927.76/19,563.12
  6. Step 6: Final answer
    x = 15,426.68

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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.