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Finding the Fourth Proportional to 13,212.75, 18,233.64 and 7,623.75

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Solution

The fourth proportional to 13,212.75, 18,233.64 and 7,623.75 is: 10,520.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,212.75 : 18,233.64 = 7,623.75 : x
  2. Step 2: Convert to fraction form
    13,212.75/18,233.64 = 7,623.75/x
  3. Step 3: Cross multiply
    13,212.75x = 18,233.64 × 7,623.75
  4. Step 4: Simplify right side
    13,212.75x = 139,008,712.95
  5. Step 5: Solve for x
    x = 139,008,712.95/13,212.75
  6. Step 6: Final answer
    x = 10,520.80

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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.