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Finding the Fourth Proportional to 22,988.49, 31,727.81 and 21,487.66

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Solution

The fourth proportional to 22,988.49, 31,727.81 and 21,487.66 is: 29,656.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,988.49 : 31,727.81 = 21,487.66 : x
  2. Step 2: Convert to fraction form
    22,988.49/31,727.81 = 21,487.66/x
  3. Step 3: Cross multiply
    22,988.49x = 31,727.81 × 21,487.66
  4. Step 4: Simplify right side
    22,988.49x = 681,756,393.82
  5. Step 5: Solve for x
    x = 681,756,393.82/22,988.49
  6. Step 6: Final answer
    x = 29,656.42

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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.