Home / 13,755.21-20,632.77-4,990.11

Finding the Fourth Proportional to 13,755.21, 20,632.77 and 4,990.11

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Solution

The fourth proportional to 13,755.21, 20,632.77 and 4,990.11 is: 7,485.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,755.21 : 20,632.77 = 4,990.11 : x
  2. Step 2: Convert to fraction form
    13,755.21/20,632.77 = 4,990.11/x
  3. Step 3: Cross multiply
    13,755.21x = 20,632.77 × 4,990.11
  4. Step 4: Simplify right side
    13,755.21x = 102,959,791.90
  5. Step 5: Solve for x
    x = 102,959,791.90/13,755.21
  6. Step 6: Final answer
    x = 7,485.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.