Home / 20,891.36-28,828.20-11,938.84

Finding the Fourth Proportional to 20,891.36, 28,828.20 and 11,938.84

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Solution

The fourth proportional to 20,891.36, 28,828.20 and 11,938.84 is: 16,474.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.36 : 28,828.20 = 11,938.84 : x
  2. Step 2: Convert to fraction form
    20,891.36/28,828.20 = 11,938.84/x
  3. Step 3: Cross multiply
    20,891.36x = 28,828.20 × 11,938.84
  4. Step 4: Simplify right side
    20,891.36x = 344,175,267.29
  5. Step 5: Solve for x
    x = 344,175,267.29/20,891.36
  6. Step 6: Final answer
    x = 16,474.53

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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.