Home / 20,951.12-28,912.56-11,519.84

Finding the Fourth Proportional to 20,951.12, 28,912.56 and 11,519.84

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Solution

The fourth proportional to 20,951.12, 28,912.56 and 11,519.84 is: 15,897.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,951.12 : 28,912.56 = 11,519.84 : x
  2. Step 2: Convert to fraction form
    20,951.12/28,912.56 = 11,519.84/x
  3. Step 3: Cross multiply
    20,951.12x = 28,912.56 × 11,519.84
  4. Step 4: Simplify right side
    20,951.12x = 333,068,065.19
  5. Step 5: Solve for x
    x = 333,068,065.19/20,951.12
  6. Step 6: Final answer
    x = 15,897.39

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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.