Home / 20,994.06-28,970.90-11,433.97

Finding the Fourth Proportional to 20,994.06, 28,970.90 and 11,433.97

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Solution

The fourth proportional to 20,994.06, 28,970.90 and 11,433.97 is: 15,778.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.06 : 28,970.90 = 11,433.97 : x
  2. Step 2: Convert to fraction form
    20,994.06/28,970.90 = 11,433.97/x
  3. Step 3: Cross multiply
    20,994.06x = 28,970.90 × 11,433.97
  4. Step 4: Simplify right side
    20,994.06x = 331,252,379.70
  5. Step 5: Solve for x
    x = 331,252,379.70/20,994.06
  6. Step 6: Final answer
    x = 15,778.38

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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.