Home / 20,783.84-28,680.62-11,831.31

Finding the Fourth Proportional to 20,783.84, 28,680.62 and 11,831.31

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Solution

The fourth proportional to 20,783.84, 28,680.62 and 11,831.31 is: 16,326.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,783.84 : 28,680.62 = 11,831.31 : x
  2. Step 2: Convert to fraction form
    20,783.84/28,680.62 = 11,831.31/x
  3. Step 3: Cross multiply
    20,783.84x = 28,680.62 × 11,831.31
  4. Step 4: Simplify right side
    20,783.84x = 339,329,247.06
  5. Step 5: Solve for x
    x = 339,329,247.06/20,783.84
  6. Step 6: Final answer
    x = 16,326.59

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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.