Home / 20,954.07-28,923.41-13,420.68

Finding the Fourth Proportional to 20,954.07, 28,923.41 and 13,420.68

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Solution

The fourth proportional to 20,954.07, 28,923.41 and 13,420.68 is: 18,524.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,954.07 : 28,923.41 = 13,420.68 : x
  2. Step 2: Convert to fraction form
    20,954.07/28,923.41 = 13,420.68/x
  3. Step 3: Cross multiply
    20,954.07x = 28,923.41 × 13,420.68
  4. Step 4: Simplify right side
    20,954.07x = 388,171,763.02
  5. Step 5: Solve for x
    x = 388,171,763.02/20,954.07
  6. Step 6: Final answer
    x = 18,524.89

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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.