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Finding the Fourth Proportional to 6,490.92, 8,955.72 and 4,135.44

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Solution

The fourth proportional to 6,490.92, 8,955.72 and 4,135.44 is: 5,705.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,490.92 : 8,955.72 = 4,135.44 : x
  2. Step 2: Convert to fraction form
    6,490.92/8,955.72 = 4,135.44/x
  3. Step 3: Cross multiply
    6,490.92x = 8,955.72 × 4,135.44
  4. Step 4: Simplify right side
    6,490.92x = 37,035,842.72
  5. Step 5: Solve for x
    x = 37,035,842.72/6,490.92
  6. Step 6: Final answer
    x = 5,705.79

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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.