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Finding the Fourth Proportional to 18,989.00, 28,461.78 and 11,576.99

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Solution

The fourth proportional to 18,989.00, 28,461.78 and 11,576.99 is: 17,352.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989.00 : 28,461.78 = 11,576.99 : x
  2. Step 2: Convert to fraction form
    18,989.00/28,461.78 = 11,576.99/x
  3. Step 3: Cross multiply
    18,989.00x = 28,461.78 × 11,576.99
  4. Step 4: Simplify right side
    18,989.00x = 329,501,813.60
  5. Step 5: Solve for x
    x = 329,501,813.60/18,989.00
  6. Step 6: Final answer
    x = 17,352.25

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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.