Home / 20,982.99-28,956.38-11,551.35

Finding the Fourth Proportional to 20,982.99, 28,956.38 and 11,551.35

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Solution

The fourth proportional to 20,982.99, 28,956.38 and 11,551.35 is: 15,940.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.99 : 28,956.38 = 11,551.35 : x
  2. Step 2: Convert to fraction form
    20,982.99/28,956.38 = 11,551.35/x
  3. Step 3: Cross multiply
    20,982.99x = 28,956.38 × 11,551.35
  4. Step 4: Simplify right side
    20,982.99x = 334,485,222.36
  5. Step 5: Solve for x
    x = 334,485,222.36/20,982.99
  6. Step 6: Final answer
    x = 15,940.78

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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.