Home / 21,928.35-30,239.61-20,107.08

Finding the Fourth Proportional to 21,928.35, 30,239.61 and 20,107.08

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Solution

The fourth proportional to 21,928.35, 30,239.61 and 20,107.08 is: 27,728.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,928.35 : 30,239.61 = 20,107.08 : x
  2. Step 2: Convert to fraction form
    21,928.35/30,239.61 = 20,107.08/x
  3. Step 3: Cross multiply
    21,928.35x = 30,239.61 × 20,107.08
  4. Step 4: Simplify right side
    21,928.35x = 608,030,257.44
  5. Step 5: Solve for x
    x = 608,030,257.44/21,928.35
  6. Step 6: Final answer
    x = 27,728.04

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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.