Home / 13,131.20-18,121.53-7,466.90

Finding the Fourth Proportional to 13,131.20, 18,121.53 and 7,466.90

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Solution

The fourth proportional to 13,131.20, 18,121.53 and 7,466.90 is: 10,304.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,131.20 : 18,121.53 = 7,466.90 : x
  2. Step 2: Convert to fraction form
    13,131.20/18,121.53 = 7,466.90/x
  3. Step 3: Cross multiply
    13,131.20x = 18,121.53 × 7,466.90
  4. Step 4: Simplify right side
    13,131.20x = 135,311,652.36
  5. Step 5: Solve for x
    x = 135,311,652.36/13,131.20
  6. Step 6: Final answer
    x = 10,304.59

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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.