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Finding the Fourth Proportional to 18,827.60, 28,241.44 and 5,679.99

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Solution

The fourth proportional to 18,827.60, 28,241.44 and 5,679.99 is: 8,520.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,827.60 : 28,241.44 = 5,679.99 : x
  2. Step 2: Convert to fraction form
    18,827.60/28,241.44 = 5,679.99/x
  3. Step 3: Cross multiply
    18,827.60x = 28,241.44 × 5,679.99
  4. Step 4: Simplify right side
    18,827.60x = 160,411,096.79
  5. Step 5: Solve for x
    x = 160,411,096.79/18,827.60
  6. Step 6: Final answer
    x = 8,520.00

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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.