Home / 13,638.93-20,458.32-3,778.17

Finding the Fourth Proportional to 13,638.93, 20,458.32 and 3,778.17

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Solution

The fourth proportional to 13,638.93, 20,458.32 and 3,778.17 is: 5,667.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,638.93 : 20,458.32 = 3,778.17 : x
  2. Step 2: Convert to fraction form
    13,638.93/20,458.32 = 3,778.17/x
  3. Step 3: Cross multiply
    13,638.93x = 20,458.32 × 3,778.17
  4. Step 4: Simplify right side
    13,638.93x = 77,295,010.87
  5. Step 5: Solve for x
    x = 77,295,010.87/13,638.93
  6. Step 6: Final answer
    x = 5,667.23

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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.