Home / 21,913.62-30,240.99-20,239.35

Finding the Fourth Proportional to 21,913.62, 30,240.99 and 20,239.35

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Solution

The fourth proportional to 21,913.62, 30,240.99 and 20,239.35 is: 27,930.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,913.62 : 30,240.99 = 20,239.35 : x
  2. Step 2: Convert to fraction form
    21,913.62/30,240.99 = 20,239.35/x
  3. Step 3: Cross multiply
    21,913.62x = 30,240.99 × 20,239.35
  4. Step 4: Simplify right side
    21,913.62x = 612,057,980.96
  5. Step 5: Solve for x
    x = 612,057,980.96/21,913.62
  6. Step 6: Final answer
    x = 27,930.48

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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.