Home / 13,786.60-20,669.82-4,421.29

Finding the Fourth Proportional to 13,786.60, 20,669.82 and 4,421.29

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Solution

The fourth proportional to 13,786.60, 20,669.82 and 4,421.29 is: 6,628.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,786.60 : 20,669.82 = 4,421.29 : x
  2. Step 2: Convert to fraction form
    13,786.60/20,669.82 = 4,421.29/x
  3. Step 3: Cross multiply
    13,786.60x = 20,669.82 × 4,421.29
  4. Step 4: Simplify right side
    13,786.60x = 91,387,224.19
  5. Step 5: Solve for x
    x = 91,387,224.19/13,786.60
  6. Step 6: Final answer
    x = 6,628.70

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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.