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Finding the Fourth Proportional to 8,861.36, 12,173.94 and 7,929.50

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Solution

The fourth proportional to 8,861.36, 12,173.94 and 7,929.50 is: 10,893.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,861.36 : 12,173.94 = 7,929.50 : x
  2. Step 2: Convert to fraction form
    8,861.36/12,173.94 = 7,929.50/x
  3. Step 3: Cross multiply
    8,861.36x = 12,173.94 × 7,929.50
  4. Step 4: Simplify right side
    8,861.36x = 96,533,196.36
  5. Step 5: Solve for x
    x = 96,533,196.36/8,861.36
  6. Step 6: Final answer
    x = 10,893.73

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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.