Home / 30,906.36-42,656.83-20,164.55

Finding the Fourth Proportional to 30,906.36, 42,656.83 and 20,164.55

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Solution

The fourth proportional to 30,906.36, 42,656.83 and 20,164.55 is: 27,831.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,906.36 : 42,656.83 = 20,164.55 : x
  2. Step 2: Convert to fraction form
    30,906.36/42,656.83 = 20,164.55/x
  3. Step 3: Cross multiply
    30,906.36x = 42,656.83 × 20,164.55
  4. Step 4: Simplify right side
    30,906.36x = 860,155,517.68
  5. Step 5: Solve for x
    x = 860,155,517.68/30,906.36
  6. Step 6: Final answer
    x = 27,831.02

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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.