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Finding the Fourth Proportional to 13,401.54, 18,502.52 and 8,629.79

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Solution

The fourth proportional to 13,401.54, 18,502.52 and 8,629.79 is: 11,914.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,401.54 : 18,502.52 = 8,629.79 : x
  2. Step 2: Convert to fraction form
    13,401.54/18,502.52 = 8,629.79/x
  3. Step 3: Cross multiply
    13,401.54x = 18,502.52 × 8,629.79
  4. Step 4: Simplify right side
    13,401.54x = 159,672,726.41
  5. Step 5: Solve for x
    x = 159,672,726.41/13,401.54
  6. Step 6: Final answer
    x = 11,914.51

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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.