Home / 21,210.21-31,786.97-11,328.21

Finding the Fourth Proportional to 21,210.21, 31,786.97 and 11,328.21

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Solution

The fourth proportional to 21,210.21, 31,786.97 and 11,328.21 is: 16,977.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,210.21 : 31,786.97 = 11,328.21 : x
  2. Step 2: Convert to fraction form
    21,210.21/31,786.97 = 11,328.21/x
  3. Step 3: Cross multiply
    21,210.21x = 31,786.97 × 11,328.21
  4. Step 4: Simplify right side
    21,210.21x = 360,089,414.78
  5. Step 5: Solve for x
    x = 360,089,414.78/21,210.21
  6. Step 6: Final answer
    x = 16,977.17

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1.5x scale

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.