Home / 20,556.78-30,864.36-19,617.18

Finding the Fourth Proportional to 20,556.78, 30,864.36 and 19,617.18

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Solution

The fourth proportional to 20,556.78, 30,864.36 and 19,617.18 is: 29,453.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,556.78 : 30,864.36 = 19,617.18 : x
  2. Step 2: Convert to fraction form
    20,556.78/30,864.36 = 19,617.18/x
  3. Step 3: Cross multiply
    20,556.78x = 30,864.36 × 19,617.18
  4. Step 4: Simplify right side
    20,556.78x = 605,471,705.70
  5. Step 5: Solve for x
    x = 605,471,705.70/20,556.78
  6. Step 6: Final answer
    x = 29,453.63

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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.