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Finding the Fourth Proportional to 8,485.60, 12,728.40 and 6,845.35

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Solution

The fourth proportional to 8,485.60, 12,728.40 and 6,845.35 is: 10,268.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.60 : 12,728.40 = 6,845.35 : x
  2. Step 2: Convert to fraction form
    8,485.60/12,728.40 = 6,845.35/x
  3. Step 3: Cross multiply
    8,485.60x = 12,728.40 × 6,845.35
  4. Step 4: Simplify right side
    8,485.60x = 87,130,352.94
  5. Step 5: Solve for x
    x = 87,130,352.94/8,485.60
  6. Step 6: Final answer
    x = 10,268.03

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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.