Home / 21,340.80-29,453.44-11,912.32

Finding the Fourth Proportional to 21,340.80, 29,453.44 and 11,912.32

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Solution

The fourth proportional to 21,340.80, 29,453.44 and 11,912.32 is: 16,440.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,340.80 : 29,453.44 = 11,912.32 : x
  2. Step 2: Convert to fraction form
    21,340.80/29,453.44 = 11,912.32/x
  3. Step 3: Cross multiply
    21,340.80x = 29,453.44 × 11,912.32
  4. Step 4: Simplify right side
    21,340.80x = 350,858,802.38
  5. Step 5: Solve for x
    x = 350,858,802.38/21,340.80
  6. Step 6: Final answer
    x = 16,440.75

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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.