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Finding the Fourth Proportional to 13,612.84, 18,790.92 and 13,238.32

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Solution

The fourth proportional to 13,612.84, 18,790.92 and 13,238.32 is: 18,273.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.84 : 18,790.92 = 13,238.32 : x
  2. Step 2: Convert to fraction form
    13,612.84/18,790.92 = 13,238.32/x
  3. Step 3: Cross multiply
    13,612.84x = 18,790.92 × 13,238.32
  4. Step 4: Simplify right side
    13,612.84x = 248,760,212.05
  5. Step 5: Solve for x
    x = 248,760,212.05/13,612.84
  6. Step 6: Final answer
    x = 18,273.94

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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.