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Finding the Fourth Proportional to 20,483.75, 30,728.87 and 7,335.83

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Solution

The fourth proportional to 20,483.75, 30,728.87 and 7,335.83 is: 11,004.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,483.75 : 30,728.87 = 7,335.83 : x
  2. Step 2: Convert to fraction form
    20,483.75/30,728.87 = 7,335.83/x
  3. Step 3: Cross multiply
    20,483.75x = 30,728.87 × 7,335.83
  4. Step 4: Simplify right side
    20,483.75x = 225,421,766.41
  5. Step 5: Solve for x
    x = 225,421,766.41/20,483.75
  6. Step 6: Final answer
    x = 11,004.91

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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.