Home / 11,642.45-16,085.36-8,121.38

Finding the Fourth Proportional to 11,642.45, 16,085.36 and 8,121.38

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Solution

The fourth proportional to 11,642.45, 16,085.36 and 8,121.38 is: 11,220.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,642.45 : 16,085.36 = 8,121.38 : x
  2. Step 2: Convert to fraction form
    11,642.45/16,085.36 = 8,121.38/x
  3. Step 3: Cross multiply
    11,642.45x = 16,085.36 × 8,121.38
  4. Step 4: Simplify right side
    11,642.45x = 130,635,260.87
  5. Step 5: Solve for x
    x = 130,635,260.87/11,642.45
  6. Step 6: Final answer
    x = 11,220.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.