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Finding the Fourth Proportional to 21,709.40, 32,567.70 and 8,562.20

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Solution

The fourth proportional to 21,709.40, 32,567.70 and 8,562.20 is: 12,844.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,709.40 : 32,567.70 = 8,562.20 : x
  2. Step 2: Convert to fraction form
    21,709.40/32,567.70 = 8,562.20/x
  3. Step 3: Cross multiply
    21,709.40x = 32,567.70 × 8,562.20
  4. Step 4: Simplify right side
    21,709.40x = 278,851,160.94
  5. Step 5: Solve for x
    x = 278,851,160.94/21,709.40
  6. Step 6: Final answer
    x = 12,844.72

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.