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Finding the Fourth Proportional to 30,551.20, 45,783.60 and 18,829.60

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Solution

The fourth proportional to 30,551.20, 45,783.60 and 18,829.60 is: 28,217.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,551.20 : 45,783.60 = 18,829.60 : x
  2. Step 2: Convert to fraction form
    30,551.20/45,783.60 = 18,829.60/x
  3. Step 3: Cross multiply
    30,551.20x = 45,783.60 × 18,829.60
  4. Step 4: Simplify right side
    30,551.20x = 862,086,874.56
  5. Step 5: Solve for x
    x = 862,086,874.56/30,551.20
  6. Step 6: Final answer
    x = 28,217.77

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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.