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Finding the Fourth Proportional to 18,913.10, 28,325.90 and 18,257.00

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Solution

The fourth proportional to 18,913.10, 28,325.90 and 18,257.00 is: 27,343.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,913.10 : 28,325.90 = 18,257.00 : x
  2. Step 2: Convert to fraction form
    18,913.10/28,325.90 = 18,257.00/x
  3. Step 3: Cross multiply
    18,913.10x = 28,325.90 × 18,257.00
  4. Step 4: Simplify right side
    18,913.10x = 517,145,860.31
  5. Step 5: Solve for x
    x = 517,145,860.31/18,913.10
  6. Step 6: Final answer
    x = 27,343.27

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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.