Home / 13,809.90-20,716.20-5,042.79

Finding the Fourth Proportional to 13,809.90, 20,716.20 and 5,042.79

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Solution

The fourth proportional to 13,809.90, 20,716.20 and 5,042.79 is: 7,564.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,809.90 : 20,716.20 = 5,042.79 : x
  2. Step 2: Convert to fraction form
    13,809.90/20,716.20 = 5,042.79/x
  3. Step 3: Cross multiply
    13,809.90x = 20,716.20 × 5,042.79
  4. Step 4: Simplify right side
    13,809.90x = 104,467,446.20
  5. Step 5: Solve for x
    x = 104,467,446.20/13,809.90
  6. Step 6: Final answer
    x = 7,564.68

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1.5x scale

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.