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Finding the Fourth Proportional to 6,485.88, 9,728.94 and 2,103.32

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Solution

The fourth proportional to 6,485.88, 9,728.94 and 2,103.32 is: 3,155.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,485.88 : 9,728.94 = 2,103.32 : x
  2. Step 2: Convert to fraction form
    6,485.88/9,728.94 = 2,103.32/x
  3. Step 3: Cross multiply
    6,485.88x = 9,728.94 × 2,103.32
  4. Step 4: Simplify right side
    6,485.88x = 20,463,074.08
  5. Step 5: Solve for x
    x = 20,463,074.08/6,485.88
  6. Step 6: Final answer
    x = 3,155.02

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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.