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Finding the Fourth Proportional to 6,915.99, 10,378.29 and 2,811.99

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Solution

The fourth proportional to 6,915.99, 10,378.29 and 2,811.99 is: 4,219.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,915.99 : 10,378.29 = 2,811.99 : x
  2. Step 2: Convert to fraction form
    6,915.99/10,378.29 = 2,811.99/x
  3. Step 3: Cross multiply
    6,915.99x = 10,378.29 × 2,811.99
  4. Step 4: Simplify right side
    6,915.99x = 29,183,647.70
  5. Step 5: Solve for x
    x = 29,183,647.70/6,915.99
  6. Step 6: Final answer
    x = 4,219.74

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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.