Home / 21,172.94-31,790.66-11,831.30

Finding the Fourth Proportional to 21,172.94, 31,790.66 and 11,831.30

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Solution

The fourth proportional to 21,172.94, 31,790.66 and 11,831.30 is: 17,764.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,172.94 : 31,790.66 = 11,831.30 : x
  2. Step 2: Convert to fraction form
    21,172.94/31,790.66 = 11,831.30/x
  3. Step 3: Cross multiply
    21,172.94x = 31,790.66 × 11,831.30
  4. Step 4: Simplify right side
    21,172.94x = 376,124,835.66
  5. Step 5: Solve for x
    x = 376,124,835.66/21,172.94
  6. Step 6: Final answer
    x = 17,764.41

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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.