Home / 13,415.03-18,517.71-11,518.99

Finding the Fourth Proportional to 13,415.03, 18,517.71 and 11,518.99

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Solution

The fourth proportional to 13,415.03, 18,517.71 and 11,518.99 is: 15,900.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,415.03 : 18,517.71 = 11,518.99 : x
  2. Step 2: Convert to fraction form
    13,415.03/18,517.71 = 11,518.99/x
  3. Step 3: Cross multiply
    13,415.03x = 18,517.71 × 11,518.99
  4. Step 4: Simplify right side
    13,415.03x = 213,305,352.58
  5. Step 5: Solve for x
    x = 213,305,352.58/13,415.03
  6. Step 6: Final answer
    x = 15,900.48

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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.