Home / 13,438.22-18,539.83-8,131.10

Finding the Fourth Proportional to 13,438.22, 18,539.83 and 8,131.10

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Solution

The fourth proportional to 13,438.22, 18,539.83 and 8,131.10 is: 11,217.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,438.22 : 18,539.83 = 8,131.10 : x
  2. Step 2: Convert to fraction form
    13,438.22/18,539.83 = 8,131.10/x
  3. Step 3: Cross multiply
    13,438.22x = 18,539.83 × 8,131.10
  4. Step 4: Simplify right side
    13,438.22x = 150,749,211.71
  5. Step 5: Solve for x
    x = 150,749,211.71/13,438.22
  6. Step 6: Final answer
    x = 11,217.94

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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.