Home / 21,391.08-29,517.08-11,830.31

Finding the Fourth Proportional to 21,391.08, 29,517.08 and 11,830.31

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Solution

The fourth proportional to 21,391.08, 29,517.08 and 11,830.31 is: 16,324.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.08 : 29,517.08 = 11,830.31 : x
  2. Step 2: Convert to fraction form
    21,391.08/29,517.08 = 11,830.31/x
  3. Step 3: Cross multiply
    21,391.08x = 29,517.08 × 11,830.31
  4. Step 4: Simplify right side
    21,391.08x = 349,195,999.96
  5. Step 5: Solve for x
    x = 349,195,999.96/21,391.08
  6. Step 6: Final answer
    x = 16,324.37

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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.