Home / 21,728.36-30,003.54-13,784.69

Finding the Fourth Proportional to 21,728.36, 30,003.54 and 13,784.69

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Solution

The fourth proportional to 21,728.36, 30,003.54 and 13,784.69 is: 19,034.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,728.36 : 30,003.54 = 13,784.69 : x
  2. Step 2: Convert to fraction form
    21,728.36/30,003.54 = 13,784.69/x
  3. Step 3: Cross multiply
    21,728.36x = 30,003.54 × 13,784.69
  4. Step 4: Simplify right side
    21,728.36x = 413,589,497.80
  5. Step 5: Solve for x
    x = 413,589,497.80/21,728.36
  6. Step 6: Final answer
    x = 19,034.55

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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.