Home / 11,128.15-16,691.14-2,920.15

Finding the Fourth Proportional to 11,128.15, 16,691.14 and 2,920.15

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Solution

The fourth proportional to 11,128.15, 16,691.14 and 2,920.15 is: 4,379.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.15 : 16,691.14 = 2,920.15 : x
  2. Step 2: Convert to fraction form
    11,128.15/16,691.14 = 2,920.15/x
  3. Step 3: Cross multiply
    11,128.15x = 16,691.14 × 2,920.15
  4. Step 4: Simplify right side
    11,128.15x = 48,740,632.47
  5. Step 5: Solve for x
    x = 48,740,632.47/11,128.15
  6. Step 6: Final answer
    x = 4,379.94

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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.