Home / 20,910.08-31,356-6,118.66

Finding the Fourth Proportional to 20,910.08, 31,356 and 6,118.66

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Solution

The fourth proportional to 20,910.08, 31,356 and 6,118.66 is: 9,175.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,910.08 : 31,356 = 6,118.66 : x
  2. Step 2: Convert to fraction form
    20,910.08/31,356 = 6,118.66/x
  3. Step 3: Cross multiply
    20,910.08x = 31,356 × 6,118.66
  4. Step 4: Simplify right side
    20,910.08x = 191,856,702.96
  5. Step 5: Solve for x
    x = 191,856,702.96/20,910.08
  6. Step 6: Final answer
    x = 9,175.32

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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.