Home / 21,922.35-30,157.21-19,221.40

Finding the Fourth Proportional to 21,922.35, 30,157.21 and 19,221.40

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Solution

The fourth proportional to 21,922.35, 30,157.21 and 19,221.40 is: 26,441.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,922.35 : 30,157.21 = 19,221.40 : x
  2. Step 2: Convert to fraction form
    21,922.35/30,157.21 = 19,221.40/x
  3. Step 3: Cross multiply
    21,922.35x = 30,157.21 × 19,221.40
  4. Step 4: Simplify right side
    21,922.35x = 579,663,858.02
  5. Step 5: Solve for x
    x = 579,663,858.02/21,922.35
  6. Step 6: Final answer
    x = 26,441.69

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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.