Home / 13,445.32-18,550.26-8,138.44

Finding the Fourth Proportional to 13,445.32, 18,550.26 and 8,138.44

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Solution

The fourth proportional to 13,445.32, 18,550.26 and 8,138.44 is: 11,228.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,445.32 : 18,550.26 = 8,138.44 : x
  2. Step 2: Convert to fraction form
    13,445.32/18,550.26 = 8,138.44/x
  3. Step 3: Cross multiply
    13,445.32x = 18,550.26 × 8,138.44
  4. Step 4: Simplify right side
    13,445.32x = 150,970,177.99
  5. Step 5: Solve for x
    x = 150,970,177.99/13,445.32
  6. Step 6: Final answer
    x = 11,228.46

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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.