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Finding the Fourth Proportional to 8,485.20, 12,727.80 and 8,125.27

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Solution

The fourth proportional to 8,485.20, 12,727.80 and 8,125.27 is: 12,187.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,485.20 : 12,727.80 = 8,125.27 : x
  2. Step 2: Convert to fraction form
    8,485.20/12,727.80 = 8,125.27/x
  3. Step 3: Cross multiply
    8,485.20x = 12,727.80 × 8,125.27
  4. Step 4: Simplify right side
    8,485.20x = 103,416,779.69
  5. Step 5: Solve for x
    x = 103,416,779.69/8,485.20
  6. Step 6: Final answer
    x = 12,187.90

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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.