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Finding the Fourth Proportional to 5,285.12, 7,921.74 and 1,995.98

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Solution

The fourth proportional to 5,285.12, 7,921.74 and 1,995.98 is: 2,991.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,285.12 : 7,921.74 = 1,995.98 : x
  2. Step 2: Convert to fraction form
    5,285.12/7,921.74 = 1,995.98/x
  3. Step 3: Cross multiply
    5,285.12x = 7,921.74 × 1,995.98
  4. Step 4: Simplify right side
    5,285.12x = 15,811,634.61
  5. Step 5: Solve for x
    x = 15,811,634.61/5,285.12
  6. Step 6: Final answer
    x = 2,991.73

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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.