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Finding the Fourth Proportional to 18,773.28, 25,905.96 and 10,389.96

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Solution

The fourth proportional to 18,773.28, 25,905.96 and 10,389.96 is: 14,337.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,773.28 : 25,905.96 = 10,389.96 : x
  2. Step 2: Convert to fraction form
    18,773.28/25,905.96 = 10,389.96/x
  3. Step 3: Cross multiply
    18,773.28x = 25,905.96 × 10,389.96
  4. Step 4: Simplify right side
    18,773.28x = 269,161,888.16
  5. Step 5: Solve for x
    x = 269,161,888.16/18,773.28
  6. Step 6: Final answer
    x = 14,337.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.