Home / 21,119.06-31,709.75-11,777.33

Finding the Fourth Proportional to 21,119.06, 31,709.75 and 11,777.33

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Solution

The fourth proportional to 21,119.06, 31,709.75 and 11,777.33 is: 17,683.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.06 : 31,709.75 = 11,777.33 : x
  2. Step 2: Convert to fraction form
    21,119.06/31,709.75 = 11,777.33/x
  3. Step 3: Cross multiply
    21,119.06x = 31,709.75 × 11,777.33
  4. Step 4: Simplify right side
    21,119.06x = 373,456,210.36
  5. Step 5: Solve for x
    x = 373,456,210.36/21,119.06
  6. Step 6: Final answer
    x = 17,683.37

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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.