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Finding the Fourth Proportional to 7,057, 10,620.95 and 5,311.05

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Solution

The fourth proportional to 7,057, 10,620.95 and 5,311.05 is: 7,993.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,057 : 10,620.95 = 5,311.05 : x
  2. Step 2: Convert to fraction form
    7,057/10,620.95 = 5,311.05/x
  3. Step 3: Cross multiply
    7,057x = 10,620.95 × 5,311.05
  4. Step 4: Simplify right side
    7,057x = 56,408,396.50
  5. Step 5: Solve for x
    x = 56,408,396.50/7,057
  6. Step 6: Final answer
    x = 7,993.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.