Home / 13,620.86-20,448.58-11,581.82

Finding the Fourth Proportional to 13,620.86, 20,448.58 and 11,581.82

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Solution

The fourth proportional to 13,620.86, 20,448.58 and 11,581.82 is: 17,387.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.86 : 20,448.58 = 11,581.82 : x
  2. Step 2: Convert to fraction form
    13,620.86/20,448.58 = 11,581.82/x
  3. Step 3: Cross multiply
    13,620.86x = 20,448.58 × 11,581.82
  4. Step 4: Simplify right side
    13,620.86x = 236,831,772.82
  5. Step 5: Solve for x
    x = 236,831,772.82/13,620.86
  6. Step 6: Final answer
    x = 17,387.43

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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.