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Finding the Fourth Proportional to 7,997.80, 12,000.40 and 3,065.80

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Solution

The fourth proportional to 7,997.80, 12,000.40 and 3,065.80 is: 4,600.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,997.80 : 12,000.40 = 3,065.80 : x
  2. Step 2: Convert to fraction form
    7,997.80/12,000.40 = 3,065.80/x
  3. Step 3: Cross multiply
    7,997.80x = 12,000.40 × 3,065.80
  4. Step 4: Simplify right side
    7,997.80x = 36,790,826.32
  5. Step 5: Solve for x
    x = 36,790,826.32/7,997.80
  6. Step 6: Final answer
    x = 4,600.12

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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.