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Finding the Fourth Proportional to 28,243.49, 42,372.06 and 8,520.85

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Solution

The fourth proportional to 28,243.49, 42,372.06 and 8,520.85 is: 12,783.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,243.49 : 42,372.06 = 8,520.85 : x
  2. Step 2: Convert to fraction form
    28,243.49/42,372.06 = 8,520.85/x
  3. Step 3: Cross multiply
    28,243.49x = 42,372.06 × 8,520.85
  4. Step 4: Simplify right side
    28,243.49x = 361,045,798.05
  5. Step 5: Solve for x
    x = 361,045,798.05/28,243.49
  6. Step 6: Final answer
    x = 12,783.33

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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.