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Finding the Fourth Proportional to 13,612.56, 18,787.32 and 8,308.08

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Solution

The fourth proportional to 13,612.56, 18,787.32 and 8,308.08 is: 11,466.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.56 : 18,787.32 = 8,308.08 : x
  2. Step 2: Convert to fraction form
    13,612.56/18,787.32 = 8,308.08/x
  3. Step 3: Cross multiply
    13,612.56x = 18,787.32 × 8,308.08
  4. Step 4: Simplify right side
    13,612.56x = 156,086,557.55
  5. Step 5: Solve for x
    x = 156,086,557.55/13,612.56
  6. Step 6: Final answer
    x = 11,466.36

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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.