Home / 21,149.86-31,728.45-7,111.26

Finding the Fourth Proportional to 21,149.86, 31,728.45 and 7,111.26

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Solution

The fourth proportional to 21,149.86, 31,728.45 and 7,111.26 is: 10,668.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.86 : 31,728.45 = 7,111.26 : x
  2. Step 2: Convert to fraction form
    21,149.86/31,728.45 = 7,111.26/x
  3. Step 3: Cross multiply
    21,149.86x = 31,728.45 × 7,111.26
  4. Step 4: Simplify right side
    21,149.86x = 225,629,257.35
  5. Step 5: Solve for x
    x = 225,629,257.35/21,149.86
  6. Step 6: Final answer
    x = 10,668.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.