Home / 11,987.12-17,980.68-3,667.21

Finding the Fourth Proportional to 11,987.12, 17,980.68 and 3,667.21

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Solution

The fourth proportional to 11,987.12, 17,980.68 and 3,667.21 is: 5,500.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,987.12 : 17,980.68 = 3,667.21 : x
  2. Step 2: Convert to fraction form
    11,987.12/17,980.68 = 3,667.21/x
  3. Step 3: Cross multiply
    11,987.12x = 17,980.68 × 3,667.21
  4. Step 4: Simplify right side
    11,987.12x = 65,938,898.30
  5. Step 5: Solve for x
    x = 65,938,898.30/11,987.12
  6. Step 6: Final answer
    x = 5,500.81

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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.