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Finding the Fourth Proportional to 22,340.88, 30,828.09 and 13,388.16

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Solution

The fourth proportional to 22,340.88, 30,828.09 and 13,388.16 is: 18,474.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,340.88 : 30,828.09 = 13,388.16 : x
  2. Step 2: Convert to fraction form
    22,340.88/30,828.09 = 13,388.16/x
  3. Step 3: Cross multiply
    22,340.88x = 30,828.09 × 13,388.16
  4. Step 4: Simplify right side
    22,340.88x = 412,731,401.41
  5. Step 5: Solve for x
    x = 412,731,401.41/22,340.88
  6. Step 6: Final answer
    x = 18,474.27

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Double scale
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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.