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Finding the Fourth Proportional to 13,865.21, 19,141.05 and 8,563.11

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Solution

The fourth proportional to 13,865.21, 19,141.05 and 8,563.11 is: 11,821.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,865.21 : 19,141.05 = 8,563.11 : x
  2. Step 2: Convert to fraction form
    13,865.21/19,141.05 = 8,563.11/x
  3. Step 3: Cross multiply
    13,865.21x = 19,141.05 × 8,563.11
  4. Step 4: Simplify right side
    13,865.21x = 163,906,916.67
  5. Step 5: Solve for x
    x = 163,906,916.67/13,865.21
  6. Step 6: Final answer
    x = 11,821.45

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1.5x scale

Why These Related Problems?

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