Home / 11,721.36-16,180.80-7,478.16

Finding the Fourth Proportional to 11,721.36, 16,180.80 and 7,478.16

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Solution

The fourth proportional to 11,721.36, 16,180.80 and 7,478.16 is: 10,323.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,721.36 : 16,180.80 = 7,478.16 : x
  2. Step 2: Convert to fraction form
    11,721.36/16,180.80 = 7,478.16/x
  3. Step 3: Cross multiply
    11,721.36x = 16,180.80 × 7,478.16
  4. Step 4: Simplify right side
    11,721.36x = 121,002,611.33
  5. Step 5: Solve for x
    x = 121,002,611.33/11,721.36
  6. Step 6: Final answer
    x = 10,323.26

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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.