Home / 18,826.12-28,221.72-7,131.52

Finding the Fourth Proportional to 18,826.12, 28,221.72 and 7,131.52

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Solution

The fourth proportional to 18,826.12, 28,221.72 and 7,131.52 is: 10,690.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,826.12 : 28,221.72 = 7,131.52 : x
  2. Step 2: Convert to fraction form
    18,826.12/28,221.72 = 7,131.52/x
  3. Step 3: Cross multiply
    18,826.12x = 28,221.72 × 7,131.52
  4. Step 4: Simplify right side
    18,826.12x = 201,263,760.61
  5. Step 5: Solve for x
    x = 201,263,760.61/18,826.12
  6. Step 6: Final answer
    x = 10,690.67

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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.