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Finding the Fourth Proportional to 13,703.21, 18,910.41 and 7,415.57

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Solution

The fourth proportional to 13,703.21, 18,910.41 and 7,415.57 is: 10,233.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,703.21 : 18,910.41 = 7,415.57 : x
  2. Step 2: Convert to fraction form
    13,703.21/18,910.41 = 7,415.57/x
  3. Step 3: Cross multiply
    13,703.21x = 18,910.41 × 7,415.57
  4. Step 4: Simplify right side
    13,703.21x = 140,231,469.08
  5. Step 5: Solve for x
    x = 140,231,469.08/13,703.21
  6. Step 6: Final answer
    x = 10,233.48

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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.