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Finding the Fourth Proportional to 65,511.36, 98,270.40 and 18,763

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Solution

The fourth proportional to 65,511.36, 98,270.40 and 18,763 is: 28,145.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,511.36 : 98,270.40 = 18,763 : x
  2. Step 2: Convert to fraction form
    65,511.36/98,270.40 = 18,763/x
  3. Step 3: Cross multiply
    65,511.36x = 98,270.40 × 18,763
  4. Step 4: Simplify right side
    65,511.36x = 1,843,847,515.20
  5. Step 5: Solve for x
    x = 1,843,847,515.20/65,511.36
  6. Step 6: Final answer
    x = 28,145.46

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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.