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Finding the Fourth Proportional to 22,315.86, 30,785.28 and 13,361.67

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Solution

The fourth proportional to 22,315.86, 30,785.28 and 13,361.67 is: 18,432.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,315.86 : 30,785.28 = 13,361.67 : x
  2. Step 2: Convert to fraction form
    22,315.86/30,785.28 = 13,361.67/x
  3. Step 3: Cross multiply
    22,315.86x = 30,785.28 × 13,361.67
  4. Step 4: Simplify right side
    22,315.86x = 411,342,752.22
  5. Step 5: Solve for x
    x = 411,342,752.22/22,315.86
  6. Step 6: Final answer
    x = 18,432.75

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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.