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Finding the Fourth Proportional to 6,430.76, 8,879.48 and 4,936.31

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Solution

The fourth proportional to 6,430.76, 8,879.48 and 4,936.31 is: 6,815.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,430.76 : 8,879.48 = 4,936.31 : x
  2. Step 2: Convert to fraction form
    6,430.76/8,879.48 = 4,936.31/x
  3. Step 3: Cross multiply
    6,430.76x = 8,879.48 × 4,936.31
  4. Step 4: Simplify right side
    6,430.76x = 43,831,796.84
  5. Step 5: Solve for x
    x = 43,831,796.84/6,430.76
  6. Step 6: Final answer
    x = 6,815.96

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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.