Home / 12,110.31-18,160.86-7,949.21

Finding the Fourth Proportional to 12,110.31, 18,160.86 and 7,949.21

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Solution

The fourth proportional to 12,110.31, 18,160.86 and 7,949.21 is: 11,920.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,110.31 : 18,160.86 = 7,949.21 : x
  2. Step 2: Convert to fraction form
    12,110.31/18,160.86 = 7,949.21/x
  3. Step 3: Cross multiply
    12,110.31x = 18,160.86 × 7,949.21
  4. Step 4: Simplify right side
    12,110.31x = 144,364,537.44
  5. Step 5: Solve for x
    x = 144,364,537.44/12,110.31
  6. Step 6: Final answer
    x = 11,920.80

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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.