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Finding the Fourth Proportional to 18,961.94, 28,457.43 and 8,580.98

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Solution

The fourth proportional to 18,961.94, 28,457.43 and 8,580.98 is: 12,878.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,961.94 : 28,457.43 = 8,580.98 : x
  2. Step 2: Convert to fraction form
    18,961.94/28,457.43 = 8,580.98/x
  3. Step 3: Cross multiply
    18,961.94x = 28,457.43 × 8,580.98
  4. Step 4: Simplify right side
    18,961.94x = 244,192,637.68
  5. Step 5: Solve for x
    x = 244,192,637.68/18,961.94
  6. Step 6: Final answer
    x = 12,878.04

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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.