Home / 21,022.70-28,994.91-13,469.73

Finding the Fourth Proportional to 21,022.70, 28,994.91 and 13,469.73

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Solution

The fourth proportional to 21,022.70, 28,994.91 and 13,469.73 is: 18,577.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,022.70 : 28,994.91 = 13,469.73 : x
  2. Step 2: Convert to fraction form
    21,022.70/28,994.91 = 13,469.73/x
  3. Step 3: Cross multiply
    21,022.70x = 28,994.91 × 13,469.73
  4. Step 4: Simplify right side
    21,022.70x = 390,553,449.83
  5. Step 5: Solve for x
    x = 390,553,449.83/21,022.70
  6. Step 6: Final answer
    x = 18,577.71

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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.