Home / 13,780.43-20,667.50-3,917.26

Finding the Fourth Proportional to 13,780.43, 20,667.50 and 3,917.26

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Solution

The fourth proportional to 13,780.43, 20,667.50 and 3,917.26 is: 5,875.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,780.43 : 20,667.50 = 3,917.26 : x
  2. Step 2: Convert to fraction form
    13,780.43/20,667.50 = 3,917.26/x
  3. Step 3: Cross multiply
    13,780.43x = 20,667.50 × 3,917.26
  4. Step 4: Simplify right side
    13,780.43x = 80,959,971.05
  5. Step 5: Solve for x
    x = 80,959,971.05/13,780.43
  6. Step 6: Final answer
    x = 5,875.00

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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.