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Finding the Fourth Proportional to 6,285.30, 8,670.39 and 3,928.80

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Solution

The fourth proportional to 6,285.30, 8,670.39 and 3,928.80 is: 5,419.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,285.30 : 8,670.39 = 3,928.80 : x
  2. Step 2: Convert to fraction form
    6,285.30/8,670.39 = 3,928.80/x
  3. Step 3: Cross multiply
    6,285.30x = 8,670.39 × 3,928.80
  4. Step 4: Simplify right side
    6,285.30x = 34,064,268.11
  5. Step 5: Solve for x
    x = 34,064,268.11/6,285.30
  6. Step 6: Final answer
    x = 5,419.68

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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.