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Finding the Fourth Proportional to 8,118.84, 12,143.09 and 4,779.14

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Solution

The fourth proportional to 8,118.84, 12,143.09 and 4,779.14 is: 7,147.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.84 : 12,143.09 = 4,779.14 : x
  2. Step 2: Convert to fraction form
    8,118.84/12,143.09 = 4,779.14/x
  3. Step 3: Cross multiply
    8,118.84x = 12,143.09 × 4,779.14
  4. Step 4: Simplify right side
    8,118.84x = 58,033,442.53
  5. Step 5: Solve for x
    x = 58,033,442.53/8,118.84
  6. Step 6: Final answer
    x = 7,147.99

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1.5x scale

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.