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Finding the Fourth Proportional to 6,393.79, 8,832.14 and 5,409.64

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Solution

The fourth proportional to 6,393.79, 8,832.14 and 5,409.64 is: 7,472.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,393.79 : 8,832.14 = 5,409.64 : x
  2. Step 2: Convert to fraction form
    6,393.79/8,832.14 = 5,409.64/x
  3. Step 3: Cross multiply
    6,393.79x = 8,832.14 × 5,409.64
  4. Step 4: Simplify right side
    6,393.79x = 47,778,652.43
  5. Step 5: Solve for x
    x = 47,778,652.43/6,393.79
  6. Step 6: Final answer
    x = 7,472.67

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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.