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Finding the Fourth Proportional to 7,762.75, 10,712.60 and 4,450.75

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Solution

The fourth proportional to 7,762.75, 10,712.60 and 4,450.75 is: 6,142.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,762.75 : 10,712.60 = 4,450.75 : x
  2. Step 2: Convert to fraction form
    7,762.75/10,712.60 = 4,450.75/x
  3. Step 3: Cross multiply
    7,762.75x = 10,712.60 × 4,450.75
  4. Step 4: Simplify right side
    7,762.75x = 47,679,104.45
  5. Step 5: Solve for x
    x = 47,679,104.45/7,762.75
  6. Step 6: Final answer
    x = 6,142.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.