Home / 8,815.33-12,181.25-6,421.14

Finding the Fourth Proportional to 8,815.33, 12,181.25 and 6,421.14

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Solution

The fourth proportional to 8,815.33, 12,181.25 and 6,421.14 is: 8,872.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,815.33 : 12,181.25 = 6,421.14 : x
  2. Step 2: Convert to fraction form
    8,815.33/12,181.25 = 6,421.14/x
  3. Step 3: Cross multiply
    8,815.33x = 12,181.25 × 6,421.14
  4. Step 4: Simplify right side
    8,815.33x = 78,217,511.63
  5. Step 5: Solve for x
    x = 78,217,511.63/8,815.33
  6. Step 6: Final answer
    x = 8,872.90

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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.