Home / 20,770.14-28,664.46-11,820.36

Finding the Fourth Proportional to 20,770.14, 28,664.46 and 11,820.36

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Solution

The fourth proportional to 20,770.14, 28,664.46 and 11,820.36 is: 16,313.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.14 : 28,664.46 = 11,820.36 : x
  2. Step 2: Convert to fraction form
    20,770.14/28,664.46 = 11,820.36/x
  3. Step 3: Cross multiply
    20,770.14x = 28,664.46 × 11,820.36
  4. Step 4: Simplify right side
    20,770.14x = 338,824,236.41
  5. Step 5: Solve for x
    x = 338,824,236.41/20,770.14
  6. Step 6: Final answer
    x = 16,313.05

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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.