Home / 20,517.78-30,775.74-5,726.40

Finding the Fourth Proportional to 20,517.78, 30,775.74 and 5,726.40

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Solution

The fourth proportional to 20,517.78, 30,775.74 and 5,726.40 is: 8,589.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.78 : 30,775.74 = 5,726.40 : x
  2. Step 2: Convert to fraction form
    20,517.78/30,775.74 = 5,726.40/x
  3. Step 3: Cross multiply
    20,517.78x = 30,775.74 × 5,726.40
  4. Step 4: Simplify right side
    20,517.78x = 176,234,197.54
  5. Step 5: Solve for x
    x = 176,234,197.54/20,517.78
  6. Step 6: Final answer
    x = 8,589.34

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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.