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Finding the Fourth Proportional to 20,533.20, 30,751.20 and 13,923.60

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Solution

The fourth proportional to 20,533.20, 30,751.20 and 13,923.60 is: 20,852.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,533.20 : 30,751.20 = 13,923.60 : x
  2. Step 2: Convert to fraction form
    20,533.20/30,751.20 = 13,923.60/x
  3. Step 3: Cross multiply
    20,533.20x = 30,751.20 × 13,923.60
  4. Step 4: Simplify right side
    20,533.20x = 428,167,408.32
  5. Step 5: Solve for x
    x = 428,167,408.32/20,533.20
  6. Step 6: Final answer
    x = 20,852.44

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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.