Home / 20,746.98-31,120.43-5,164.61

Finding the Fourth Proportional to 20,746.98, 31,120.43 and 5,164.61

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Solution

The fourth proportional to 20,746.98, 31,120.43 and 5,164.61 is: 7,746.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,746.98 : 31,120.43 = 5,164.61 : x
  2. Step 2: Convert to fraction form
    20,746.98/31,120.43 = 5,164.61/x
  3. Step 3: Cross multiply
    20,746.98x = 31,120.43 × 5,164.61
  4. Step 4: Simplify right side
    20,746.98x = 160,724,702.56
  5. Step 5: Solve for x
    x = 160,724,702.56/20,746.98
  6. Step 6: Final answer
    x = 7,746.90

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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.