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Finding the Fourth Proportional to 18,898.56, 28,350.72 and 8,513.28

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Solution

The fourth proportional to 18,898.56, 28,350.72 and 8,513.28 is: 12,771.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,898.56 : 28,350.72 = 8,513.28 : x
  2. Step 2: Convert to fraction form
    18,898.56/28,350.72 = 8,513.28/x
  3. Step 3: Cross multiply
    18,898.56x = 28,350.72 × 8,513.28
  4. Step 4: Simplify right side
    18,898.56x = 241,357,617.56
  5. Step 5: Solve for x
    x = 241,357,617.56/18,898.56
  6. Step 6: Final answer
    x = 12,771.22

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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.