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Finding the Fourth Proportional to 6,990.62, 10,486.46 and 1,992.95

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Solution

The fourth proportional to 6,990.62, 10,486.46 and 1,992.95 is: 2,989.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,990.62 : 10,486.46 = 1,992.95 : x
  2. Step 2: Convert to fraction form
    6,990.62/10,486.46 = 1,992.95/x
  3. Step 3: Cross multiply
    6,990.62x = 10,486.46 × 1,992.95
  4. Step 4: Simplify right side
    6,990.62x = 20,898,952.84
  5. Step 5: Solve for x
    x = 20,898,952.84/6,990.62
  6. Step 6: Final answer
    x = 2,989.57

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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.