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Finding the Fourth Proportional to 8,000.90, 12,000.40 and 2,157.96

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Solution

The fourth proportional to 8,000.90, 12,000.40 and 2,157.96 is: 3,236.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,000.90 : 12,000.40 = 2,157.96 : x
  2. Step 2: Convert to fraction form
    8,000.90/12,000.40 = 2,157.96/x
  3. Step 3: Cross multiply
    8,000.90x = 12,000.40 × 2,157.96
  4. Step 4: Simplify right side
    8,000.90x = 25,896,383.18
  5. Step 5: Solve for x
    x = 25,896,383.18/8,000.90
  6. Step 6: Final answer
    x = 3,236.68

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1.5x scale

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.