Home / 11,105.86-15,326.68-6,390.86

Finding the Fourth Proportional to 11,105.86, 15,326.68 and 6,390.86

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Solution

The fourth proportional to 11,105.86, 15,326.68 and 6,390.86 is: 8,819.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,105.86 : 15,326.68 = 6,390.86 : x
  2. Step 2: Convert to fraction form
    11,105.86/15,326.68 = 6,390.86/x
  3. Step 3: Cross multiply
    11,105.86x = 15,326.68 × 6,390.86
  4. Step 4: Simplify right side
    11,105.86x = 97,950,666.14
  5. Step 5: Solve for x
    x = 97,950,666.14/11,105.86
  6. Step 6: Final answer
    x = 8,819.73

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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.