Home / 8,415.20-11,603.40-6,898

Finding the Fourth Proportional to 8,415.20, 11,603.40 and 6,898

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Solution

The fourth proportional to 8,415.20, 11,603.40 and 6,898 is: 9,511.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415.20 : 11,603.40 = 6,898 : x
  2. Step 2: Convert to fraction form
    8,415.20/11,603.40 = 6,898/x
  3. Step 3: Cross multiply
    8,415.20x = 11,603.40 × 6,898
  4. Step 4: Simplify right side
    8,415.20x = 80,040,253.20
  5. Step 5: Solve for x
    x = 80,040,253.20/8,415.20
  6. Step 6: Final answer
    x = 9,511.39

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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.