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Finding the Fourth Proportional to 15,118.84, 20,879.94 and 13,469.68

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Solution

The fourth proportional to 15,118.84, 20,879.94 and 13,469.68 is: 18,602.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,118.84 : 20,879.94 = 13,469.68 : x
  2. Step 2: Convert to fraction form
    15,118.84/20,879.94 = 13,469.68/x
  3. Step 3: Cross multiply
    15,118.84x = 20,879.94 × 13,469.68
  4. Step 4: Simplify right side
    15,118.84x = 281,246,110.22
  5. Step 5: Solve for x
    x = 281,246,110.22/15,118.84
  6. Step 6: Final answer
    x = 18,602.36

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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.