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Finding the Fourth Proportional to 6,476.88, 9,719.58 and 2,779.86

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Solution

The fourth proportional to 6,476.88, 9,719.58 and 2,779.86 is: 4,171.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,476.88 : 9,719.58 = 2,779.86 : x
  2. Step 2: Convert to fraction form
    6,476.88/9,719.58 = 2,779.86/x
  3. Step 3: Cross multiply
    6,476.88x = 9,719.58 × 2,779.86
  4. Step 4: Simplify right side
    6,476.88x = 27,019,071.66
  5. Step 5: Solve for x
    x = 27,019,071.66/6,476.88
  6. Step 6: Final answer
    x = 4,171.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.