Home / 20,994.22-28,971.97-11,562.78

Finding the Fourth Proportional to 20,994.22, 28,971.97 and 11,562.78

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Solution

The fourth proportional to 20,994.22, 28,971.97 and 11,562.78 is: 15,956.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,994.22 : 28,971.97 = 11,562.78 : x
  2. Step 2: Convert to fraction form
    20,994.22/28,971.97 = 11,562.78/x
  3. Step 3: Cross multiply
    20,994.22x = 28,971.97 × 11,562.78
  4. Step 4: Simplify right side
    20,994.22x = 334,996,515.28
  5. Step 5: Solve for x
    x = 334,996,515.28/20,994.22
  6. Step 6: Final answer
    x = 15,956.61

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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.