Home / 20,831.03-28,745.71-11,397.77

Finding the Fourth Proportional to 20,831.03, 28,745.71 and 11,397.77

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Solution

The fourth proportional to 20,831.03, 28,745.71 and 11,397.77 is: 15,728.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.03 : 28,745.71 = 11,397.77 : x
  2. Step 2: Convert to fraction form
    20,831.03/28,745.71 = 11,397.77/x
  3. Step 3: Cross multiply
    20,831.03x = 28,745.71 × 11,397.77
  4. Step 4: Simplify right side
    20,831.03x = 327,636,991.07
  5. Step 5: Solve for x
    x = 327,636,991.07/20,831.03
  6. Step 6: Final answer
    x = 15,728.31

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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.