Home / 11,971.13-17,921.55-8,400.83

Finding the Fourth Proportional to 11,971.13, 17,921.55 and 8,400.83

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Solution

The fourth proportional to 11,971.13, 17,921.55 and 8,400.83 is: 12,576.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,971.13 : 17,921.55 = 8,400.83 : x
  2. Step 2: Convert to fraction form
    11,971.13/17,921.55 = 8,400.83/x
  3. Step 3: Cross multiply
    11,971.13x = 17,921.55 × 8,400.83
  4. Step 4: Simplify right side
    11,971.13x = 150,555,894.89
  5. Step 5: Solve for x
    x = 150,555,894.89/11,971.13
  6. Step 6: Final answer
    x = 12,576.58

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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.