Home / 21,169.03-31,728.07-7,831.39

Finding the Fourth Proportional to 21,169.03, 31,728.07 and 7,831.39

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Solution

The fourth proportional to 21,169.03, 31,728.07 and 7,831.39 is: 11,737.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,169.03 : 31,728.07 = 7,831.39 : x
  2. Step 2: Convert to fraction form
    21,169.03/31,728.07 = 7,831.39/x
  3. Step 3: Cross multiply
    21,169.03x = 31,728.07 × 7,831.39
  4. Step 4: Simplify right side
    21,169.03x = 248,474,890.12
  5. Step 5: Solve for x
    x = 248,474,890.12/21,169.03
  6. Step 6: Final answer
    x = 11,737.66

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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.