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Finding the Fourth Proportional to 8,636.50, 11,866.72 and 6,865.03

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Solution

The fourth proportional to 8,636.50, 11,866.72 and 6,865.03 is: 9,432.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,636.50 : 11,866.72 = 6,865.03 : x
  2. Step 2: Convert to fraction form
    8,636.50/11,866.72 = 6,865.03/x
  3. Step 3: Cross multiply
    8,636.50x = 11,866.72 × 6,865.03
  4. Step 4: Simplify right side
    8,636.50x = 81,465,388.80
  5. Step 5: Solve for x
    x = 81,465,388.80/8,636.50
  6. Step 6: Final answer
    x = 9,432.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.