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Finding the Fourth Proportional to 8,511.50, 11,745.87 and 4,785.50

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Solution

The fourth proportional to 8,511.50, 11,745.87 and 4,785.50 is: 6,603.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,511.50 : 11,745.87 = 4,785.50 : x
  2. Step 2: Convert to fraction form
    8,511.50/11,745.87 = 4,785.50/x
  3. Step 3: Cross multiply
    8,511.50x = 11,745.87 × 4,785.50
  4. Step 4: Simplify right side
    8,511.50x = 56,209,860.89
  5. Step 5: Solve for x
    x = 56,209,860.89/8,511.50
  6. Step 6: Final answer
    x = 6,603.99

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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.