Home / 20,982.40-28,955.80-11,551.04

Finding the Fourth Proportional to 20,982.40, 28,955.80 and 11,551.04

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Solution

The fourth proportional to 20,982.40, 28,955.80 and 11,551.04 is: 15,940.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.40 : 28,955.80 = 11,551.04 : x
  2. Step 2: Convert to fraction form
    20,982.40/28,955.80 = 11,551.04/x
  3. Step 3: Cross multiply
    20,982.40x = 28,955.80 × 11,551.04
  4. Step 4: Simplify right side
    20,982.40x = 334,469,604.03
  5. Step 5: Solve for x
    x = 334,469,604.03/20,982.40
  6. Step 6: Final answer
    x = 15,940.48

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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.