Home / 20,836.98-28,755.23-11,405.75

Finding the Fourth Proportional to 20,836.98, 28,755.23 and 11,405.75

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Solution

The fourth proportional to 20,836.98, 28,755.23 and 11,405.75 is: 15,740.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.98 : 28,755.23 = 11,405.75 : x
  2. Step 2: Convert to fraction form
    20,836.98/28,755.23 = 11,405.75/x
  3. Step 3: Cross multiply
    20,836.98x = 28,755.23 × 11,405.75
  4. Step 4: Simplify right side
    20,836.98x = 327,974,763.77
  5. Step 5: Solve for x
    x = 327,974,763.77/20,836.98
  6. Step 6: Final answer
    x = 15,740.03

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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.