Home / 20,450.21-28,220.81-11,497.68

Finding the Fourth Proportional to 20,450.21, 28,220.81 and 11,497.68

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Solution

The fourth proportional to 20,450.21, 28,220.81 and 11,497.68 is: 15,866.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,450.21 : 28,220.81 = 11,497.68 : x
  2. Step 2: Convert to fraction form
    20,450.21/28,220.81 = 11,497.68/x
  3. Step 3: Cross multiply
    20,450.21x = 28,220.81 × 11,497.68
  4. Step 4: Simplify right side
    20,450.21x = 324,473,785.23
  5. Step 5: Solve for x
    x = 324,473,785.23/20,450.21
  6. Step 6: Final answer
    x = 15,866.53

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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.