Home / 21,975.54-30,321.45-13,018.56

Finding the Fourth Proportional to 21,975.54, 30,321.45 and 13,018.56

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Solution

The fourth proportional to 21,975.54, 30,321.45 and 13,018.56 is: 17,962.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,975.54 : 30,321.45 = 13,018.56 : x
  2. Step 2: Convert to fraction form
    21,975.54/30,321.45 = 13,018.56/x
  3. Step 3: Cross multiply
    21,975.54x = 30,321.45 × 13,018.56
  4. Step 4: Simplify right side
    21,975.54x = 394,741,616.11
  5. Step 5: Solve for x
    x = 394,741,616.11/21,975.54
  6. Step 6: Final answer
    x = 17,962.77

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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.