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Finding the Fourth Proportional to 18,976.56, 28,464.72 and 6,490.56

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Solution

The fourth proportional to 18,976.56, 28,464.72 and 6,490.56 is: 9,735.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,976.56 : 28,464.72 = 6,490.56 : x
  2. Step 2: Convert to fraction form
    18,976.56/28,464.72 = 6,490.56/x
  3. Step 3: Cross multiply
    18,976.56x = 28,464.72 × 6,490.56
  4. Step 4: Simplify right side
    18,976.56x = 184,751,973.04
  5. Step 5: Solve for x
    x = 184,751,973.04/18,976.56
  6. Step 6: Final answer
    x = 9,735.80

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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.