Home / 6,431.28-8,876.43-4,071.75

Finding the Fourth Proportional to 6,431.28, 8,876.43 and 4,071.75

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Solution

The fourth proportional to 6,431.28, 8,876.43 and 4,071.75 is: 5,619.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,431.28 : 8,876.43 = 4,071.75 : x
  2. Step 2: Convert to fraction form
    6,431.28/8,876.43 = 4,071.75/x
  3. Step 3: Cross multiply
    6,431.28x = 8,876.43 × 4,071.75
  4. Step 4: Simplify right side
    6,431.28x = 36,142,603.85
  5. Step 5: Solve for x
    x = 36,142,603.85/6,431.28
  6. Step 6: Final answer
    x = 5,619.82

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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.