Home / 20,845.94-28,768.92-13,760.06

Finding the Fourth Proportional to 20,845.94, 28,768.92 and 13,760.06

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Solution

The fourth proportional to 20,845.94, 28,768.92 and 13,760.06 is: 18,989.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.94 : 28,768.92 = 13,760.06 : x
  2. Step 2: Convert to fraction form
    20,845.94/28,768.92 = 13,760.06/x
  3. Step 3: Cross multiply
    20,845.94x = 28,768.92 × 13,760.06
  4. Step 4: Simplify right side
    20,845.94x = 395,862,065.34
  5. Step 5: Solve for x
    x = 395,862,065.34/20,845.94
  6. Step 6: Final answer
    x = 18,989.89

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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.