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Finding the Fourth Proportional to 13,606.80, 18,772.56 and 8,893.80

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Solution

The fourth proportional to 13,606.80, 18,772.56 and 8,893.80 is: 12,270.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,606.80 : 18,772.56 = 8,893.80 : x
  2. Step 2: Convert to fraction form
    13,606.80/18,772.56 = 8,893.80/x
  3. Step 3: Cross multiply
    13,606.80x = 18,772.56 × 8,893.80
  4. Step 4: Simplify right side
    13,606.80x = 166,959,394.13
  5. Step 5: Solve for x
    x = 166,959,394.13/13,606.80
  6. Step 6: Final answer
    x = 12,270.29

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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.