Home / 11,910.78-16,421.77-8,511.85

Finding the Fourth Proportional to 11,910.78, 16,421.77 and 8,511.85

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Solution

The fourth proportional to 11,910.78, 16,421.77 and 8,511.85 is: 11,735.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,910.78 : 16,421.77 = 8,511.85 : x
  2. Step 2: Convert to fraction form
    11,910.78/16,421.77 = 8,511.85/x
  3. Step 3: Cross multiply
    11,910.78x = 16,421.77 × 8,511.85
  4. Step 4: Simplify right side
    11,910.78x = 139,779,674.14
  5. Step 5: Solve for x
    x = 139,779,674.14/11,910.78
  6. Step 6: Final answer
    x = 11,735.56

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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.