Home / 13,418.32-18,517.34-8,385.46

Finding the Fourth Proportional to 13,418.32, 18,517.34 and 8,385.46

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Solution

The fourth proportional to 13,418.32, 18,517.34 and 8,385.46 is: 11,571.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.32 : 18,517.34 = 8,385.46 : x
  2. Step 2: Convert to fraction form
    13,418.32/18,517.34 = 8,385.46/x
  3. Step 3: Cross multiply
    13,418.32x = 18,517.34 × 8,385.46
  4. Step 4: Simplify right side
    13,418.32x = 155,276,413.88
  5. Step 5: Solve for x
    x = 155,276,413.88/13,418.32
  6. Step 6: Final answer
    x = 11,571.97

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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.