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Finding the Fourth Proportional to 19,590.75, 27,042.93 and 13,221.11

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Solution

The fourth proportional to 19,590.75, 27,042.93 and 13,221.11 is: 18,250.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,590.75 : 27,042.93 = 13,221.11 : x
  2. Step 2: Convert to fraction form
    19,590.75/27,042.93 = 13,221.11/x
  3. Step 3: Cross multiply
    19,590.75x = 27,042.93 × 13,221.11
  4. Step 4: Simplify right side
    19,590.75x = 357,537,417.04
  5. Step 5: Solve for x
    x = 357,537,417.04/19,590.75
  6. Step 6: Final answer
    x = 18,250.32

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.