Home / 13,219.76-18,239.64-8,181.56

Finding the Fourth Proportional to 13,219.76, 18,239.64 and 8,181.56

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Solution

The fourth proportional to 13,219.76, 18,239.64 and 8,181.56 is: 11,288.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.76 : 18,239.64 = 8,181.56 : x
  2. Step 2: Convert to fraction form
    13,219.76/18,239.64 = 8,181.56/x
  3. Step 3: Cross multiply
    13,219.76x = 18,239.64 × 8,181.56
  4. Step 4: Simplify right side
    13,219.76x = 149,228,709.04
  5. Step 5: Solve for x
    x = 149,228,709.04/13,219.76
  6. Step 6: Final answer
    x = 11,288.31

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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.