Home / 20,331.91-30,485.81-6,287.78

Finding the Fourth Proportional to 20,331.91, 30,485.81 and 6,287.78

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Solution

The fourth proportional to 20,331.91, 30,485.81 and 6,287.78 is: 9,427.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.91 : 30,485.81 = 6,287.78 : x
  2. Step 2: Convert to fraction form
    20,331.91/30,485.81 = 6,287.78/x
  3. Step 3: Cross multiply
    20,331.91x = 30,485.81 × 6,287.78
  4. Step 4: Simplify right side
    20,331.91x = 191,687,913.97
  5. Step 5: Solve for x
    x = 191,687,913.97/20,331.91
  6. Step 6: Final answer
    x = 9,427.94

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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.