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Finding the Fourth Proportional to 6,485.20, 9,727.80 and 5,027.20

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Solution

The fourth proportional to 6,485.20, 9,727.80 and 5,027.20 is: 7,540.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,485.20 : 9,727.80 = 5,027.20 : x
  2. Step 2: Convert to fraction form
    6,485.20/9,727.80 = 5,027.20/x
  3. Step 3: Cross multiply
    6,485.20x = 9,727.80 × 5,027.20
  4. Step 4: Simplify right side
    6,485.20x = 48,903,596.16
  5. Step 5: Solve for x
    x = 48,903,596.16/6,485.20
  6. Step 6: Final answer
    x = 7,540.80

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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.