Home / 18,922.14-28,366.71-7,821.90

Finding the Fourth Proportional to 18,922.14, 28,366.71 and 7,821.90

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Solution

The fourth proportional to 18,922.14, 28,366.71 and 7,821.90 is: 11,726.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,922.14 : 28,366.71 = 7,821.90 : x
  2. Step 2: Convert to fraction form
    18,922.14/28,366.71 = 7,821.90/x
  3. Step 3: Cross multiply
    18,922.14x = 28,366.71 × 7,821.90
  4. Step 4: Simplify right side
    18,922.14x = 221,881,568.95
  5. Step 5: Solve for x
    x = 221,881,568.95/18,922.14
  6. Step 6: Final answer
    x = 11,726.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.