Home / 21,621.75-29,833.44-13,128.33

Finding the Fourth Proportional to 21,621.75, 29,833.44 and 13,128.33

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Solution

The fourth proportional to 21,621.75, 29,833.44 and 13,128.33 is: 18,114.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,621.75 : 29,833.44 = 13,128.33 : x
  2. Step 2: Convert to fraction form
    21,621.75/29,833.44 = 13,128.33/x
  3. Step 3: Cross multiply
    21,621.75x = 29,833.44 × 13,128.33
  4. Step 4: Simplify right side
    21,621.75x = 391,663,245.36
  5. Step 5: Solve for x
    x = 391,663,245.36/21,621.75
  6. Step 6: Final answer
    x = 18,114.32

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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.