Home / 20,786.58-28,685.79-14,747.40

Finding the Fourth Proportional to 20,786.58, 28,685.79 and 14,747.40

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Solution

The fourth proportional to 20,786.58, 28,685.79 and 14,747.40 is: 20,351.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,786.58 : 28,685.79 = 14,747.40 : x
  2. Step 2: Convert to fraction form
    20,786.58/28,685.79 = 14,747.40/x
  3. Step 3: Cross multiply
    20,786.58x = 28,685.79 × 14,747.40
  4. Step 4: Simplify right side
    20,786.58x = 423,040,819.45
  5. Step 5: Solve for x
    x = 423,040,819.45/20,786.58
  6. Step 6: Final answer
    x = 20,351.63

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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.