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Finding the Fourth Proportional to 6,489, 8,955 and 3,656.34

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Solution

The fourth proportional to 6,489, 8,955 and 3,656.34 is: 5,045.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,489 : 8,955 = 3,656.34 : x
  2. Step 2: Convert to fraction form
    6,489/8,955 = 3,656.34/x
  3. Step 3: Cross multiply
    6,489x = 8,955 × 3,656.34
  4. Step 4: Simplify right side
    6,489x = 32,742,524.70
  5. Step 5: Solve for x
    x = 32,742,524.70/6,489
  6. Step 6: Final answer
    x = 5,045.85

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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.