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Finding the Fourth Proportional to 6,405.88, 8,840.10 and 3,611.36

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Solution

The fourth proportional to 6,405.88, 8,840.10 and 3,611.36 is: 4,983.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,405.88 : 8,840.10 = 3,611.36 : x
  2. Step 2: Convert to fraction form
    6,405.88/8,840.10 = 3,611.36/x
  3. Step 3: Cross multiply
    6,405.88x = 8,840.10 × 3,611.36
  4. Step 4: Simplify right side
    6,405.88x = 31,924,783.54
  5. Step 5: Solve for x
    x = 31,924,783.54/6,405.88
  6. Step 6: Final answer
    x = 4,983.67

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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.