Home / 20,511.12-30,766.72-4,928.72

Finding the Fourth Proportional to 20,511.12, 30,766.72 and 4,928.72

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Solution

The fourth proportional to 20,511.12, 30,766.72 and 4,928.72 is: 7,393.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.12 : 30,766.72 = 4,928.72 : x
  2. Step 2: Convert to fraction form
    20,511.12/30,766.72 = 4,928.72/x
  3. Step 3: Cross multiply
    20,511.12x = 30,766.72 × 4,928.72
  4. Step 4: Simplify right side
    20,511.12x = 151,640,548.20
  5. Step 5: Solve for x
    x = 151,640,548.20/20,511.12
  6. Step 6: Final answer
    x = 7,393.09

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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.