Home / 20,571.78-30,851.28-7,422.45

Finding the Fourth Proportional to 20,571.78, 30,851.28 and 7,422.45

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Solution

The fourth proportional to 20,571.78, 30,851.28 and 7,422.45 is: 11,131.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,571.78 : 30,851.28 = 7,422.45 : x
  2. Step 2: Convert to fraction form
    20,571.78/30,851.28 = 7,422.45/x
  3. Step 3: Cross multiply
    20,571.78x = 30,851.28 × 7,422.45
  4. Step 4: Simplify right side
    20,571.78x = 228,992,083.24
  5. Step 5: Solve for x
    x = 228,992,083.24/20,571.78
  6. Step 6: Final answer
    x = 11,131.37

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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.