Home / 13,228.12-18,250.14-8,121.88

Finding the Fourth Proportional to 13,228.12, 18,250.14 and 8,121.88

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Solution

The fourth proportional to 13,228.12, 18,250.14 and 8,121.88 is: 11,205.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,228.12 : 18,250.14 = 8,121.88 : x
  2. Step 2: Convert to fraction form
    13,228.12/18,250.14 = 8,121.88/x
  3. Step 3: Cross multiply
    13,228.12x = 18,250.14 × 8,121.88
  4. Step 4: Simplify right side
    13,228.12x = 148,225,447.06
  5. Step 5: Solve for x
    x = 148,225,447.06/13,228.12
  6. Step 6: Final answer
    x = 11,205.33

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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.