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Finding the Fourth Proportional to 18,991.10, 28,488.03 and 6,511.01

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Solution

The fourth proportional to 18,991.10, 28,488.03 and 6,511.01 is: 9,767.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,991.10 : 28,488.03 = 6,511.01 : x
  2. Step 2: Convert to fraction form
    18,991.10/28,488.03 = 6,511.01/x
  3. Step 3: Cross multiply
    18,991.10x = 28,488.03 × 6,511.01
  4. Step 4: Simplify right side
    18,991.10x = 185,485,960.06
  5. Step 5: Solve for x
    x = 185,485,960.06/18,991.10
  6. Step 6: Final answer
    x = 9,767.00

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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.