Home / 11,820.74-17,731.08-8,111.72

Finding the Fourth Proportional to 11,820.74, 17,731.08 and 8,111.72

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Solution

The fourth proportional to 11,820.74, 17,731.08 and 8,111.72 is: 12,167.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,820.74 : 17,731.08 = 8,111.72 : x
  2. Step 2: Convert to fraction form
    11,820.74/17,731.08 = 8,111.72/x
  3. Step 3: Cross multiply
    11,820.74x = 17,731.08 × 8,111.72
  4. Step 4: Simplify right side
    11,820.74x = 143,829,467.60
  5. Step 5: Solve for x
    x = 143,829,467.60/11,820.74
  6. Step 6: Final answer
    x = 12,167.56

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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.