Home / 20,801.88-28,704.33-12,304.31

Finding the Fourth Proportional to 20,801.88, 28,704.33 and 12,304.31

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Solution

The fourth proportional to 20,801.88, 28,704.33 and 12,304.31 is: 16,978.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,801.88 : 28,704.33 = 12,304.31 : x
  2. Step 2: Convert to fraction form
    20,801.88/28,704.33 = 12,304.31/x
  3. Step 3: Cross multiply
    20,801.88x = 28,704.33 × 12,304.31
  4. Step 4: Simplify right side
    20,801.88x = 353,186,831.14
  5. Step 5: Solve for x
    x = 353,186,831.14/20,801.88
  6. Step 6: Final answer
    x = 16,978.60

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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.