Home / 13,121.68-18,100.04-9,580.56

Finding the Fourth Proportional to 13,121.68, 18,100.04 and 9,580.56

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Solution

The fourth proportional to 13,121.68, 18,100.04 and 9,580.56 is: 13,215.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.68 : 18,100.04 = 9,580.56 : x
  2. Step 2: Convert to fraction form
    13,121.68/18,100.04 = 9,580.56/x
  3. Step 3: Cross multiply
    13,121.68x = 18,100.04 × 9,580.56
  4. Step 4: Simplify right side
    13,121.68x = 173,408,519.22
  5. Step 5: Solve for x
    x = 173,408,519.22/13,121.68
  6. Step 6: Final answer
    x = 13,215.42

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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.