Home / 20,581.38-30,866.94-7,928.60

Finding the Fourth Proportional to 20,581.38, 30,866.94 and 7,928.60

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Solution

The fourth proportional to 20,581.38, 30,866.94 and 7,928.60 is: 11,890.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.38 : 30,866.94 = 7,928.60 : x
  2. Step 2: Convert to fraction form
    20,581.38/30,866.94 = 7,928.60/x
  3. Step 3: Cross multiply
    20,581.38x = 30,866.94 × 7,928.60
  4. Step 4: Simplify right side
    20,581.38x = 244,731,466.15
  5. Step 5: Solve for x
    x = 244,731,466.15/20,581.38
  6. Step 6: Final answer
    x = 11,890.92

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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.