Home / 13,138.24-18,131.04-7,549.60

Finding the Fourth Proportional to 13,138.24, 18,131.04 and 7,549.60

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Solution

The fourth proportional to 13,138.24, 18,131.04 and 7,549.60 is: 10,418.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,138.24 : 18,131.04 = 7,549.60 : x
  2. Step 2: Convert to fraction form
    13,138.24/18,131.04 = 7,549.60/x
  3. Step 3: Cross multiply
    13,138.24x = 18,131.04 × 7,549.60
  4. Step 4: Simplify right side
    13,138.24x = 136,882,099.58
  5. Step 5: Solve for x
    x = 136,882,099.58/13,138.24
  6. Step 6: Final answer
    x = 10,418.60

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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.