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Finding the Fourth Proportional to 22,728.87, 31,366.76 and 12,656.67

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Solution

The fourth proportional to 22,728.87, 31,366.76 and 12,656.67 is: 17,466.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,728.87 : 31,366.76 = 12,656.67 : x
  2. Step 2: Convert to fraction form
    22,728.87/31,366.76 = 12,656.67/x
  3. Step 3: Cross multiply
    22,728.87x = 31,366.76 × 12,656.67
  4. Step 4: Simplify right side
    22,728.87x = 396,998,730.29
  5. Step 5: Solve for x
    x = 396,998,730.29/22,728.87
  6. Step 6: Final answer
    x = 17,466.72

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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.