Home / 13,778.46-20,667.81-3,918.06

Finding the Fourth Proportional to 13,778.46, 20,667.81 and 3,918.06

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Solution

The fourth proportional to 13,778.46, 20,667.81 and 3,918.06 is: 5,877.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,778.46 : 20,667.81 = 3,918.06 : x
  2. Step 2: Convert to fraction form
    13,778.46/20,667.81 = 3,918.06/x
  3. Step 3: Cross multiply
    13,778.46x = 20,667.81 × 3,918.06
  4. Step 4: Simplify right side
    13,778.46x = 80,977,719.65
  5. Step 5: Solve for x
    x = 80,977,719.65/13,778.46
  6. Step 6: Final answer
    x = 5,877.12

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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.