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Finding the Fourth Proportional to 6,391.68, 8,832.96 and 5,194.32

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Solution

The fourth proportional to 6,391.68, 8,832.96 and 5,194.32 is: 7,178.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,391.68 : 8,832.96 = 5,194.32 : x
  2. Step 2: Convert to fraction form
    6,391.68/8,832.96 = 5,194.32/x
  3. Step 3: Cross multiply
    6,391.68x = 8,832.96 × 5,194.32
  4. Step 4: Simplify right side
    6,391.68x = 45,881,220.79
  5. Step 5: Solve for x
    x = 45,881,220.79/6,391.68
  6. Step 6: Final answer
    x = 7,178.27

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Half scale
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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.