Home / 21,219.25-31,780.41-10,133.78

Finding the Fourth Proportional to 21,219.25, 31,780.41 and 10,133.78

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Solution

The fourth proportional to 21,219.25, 31,780.41 and 10,133.78 is: 15,177.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.25 : 31,780.41 = 10,133.78 : x
  2. Step 2: Convert to fraction form
    21,219.25/31,780.41 = 10,133.78/x
  3. Step 3: Cross multiply
    21,219.25x = 31,780.41 × 10,133.78
  4. Step 4: Simplify right side
    21,219.25x = 322,055,825.75
  5. Step 5: Solve for x
    x = 322,055,825.75/21,219.25
  6. Step 6: Final answer
    x = 15,177.53

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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.