Home / 21,399.75-29,531.77-11,968.31

Finding the Fourth Proportional to 21,399.75, 29,531.77 and 11,968.31

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Solution

The fourth proportional to 21,399.75, 29,531.77 and 11,968.31 is: 16,516.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,399.75 : 29,531.77 = 11,968.31 : x
  2. Step 2: Convert to fraction form
    21,399.75/29,531.77 = 11,968.31/x
  3. Step 3: Cross multiply
    21,399.75x = 29,531.77 × 11,968.31
  4. Step 4: Simplify right side
    21,399.75x = 353,445,422.12
  5. Step 5: Solve for x
    x = 353,445,422.12/21,399.75
  6. Step 6: Final answer
    x = 16,516.33

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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.