Home / 20,831.69-28,747.73-11,400.25

Finding the Fourth Proportional to 20,831.69, 28,747.73 and 11,400.25

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Solution

The fourth proportional to 20,831.69, 28,747.73 and 11,400.25 is: 15,732.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,831.69 : 28,747.73 = 11,400.25 : x
  2. Step 2: Convert to fraction form
    20,831.69/28,747.73 = 11,400.25/x
  3. Step 3: Cross multiply
    20,831.69x = 28,747.73 × 11,400.25
  4. Step 4: Simplify right side
    20,831.69x = 327,731,308.93
  5. Step 5: Solve for x
    x = 327,731,308.93/20,831.69
  6. Step 6: Final answer
    x = 15,732.34

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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.