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Finding the Third Proportional to 21,998 and 35,420

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Solution

The third proportional to 21,998 and 35,420 is: 57,031.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,998 : 35,420 = 35,420 : x
  2. Step 2: Convert to fraction form
    21,998/35,420 = 35,420/x
  3. Step 3: Cross multiply
    21,998x = 35,420 × 35,420
  4. Step 4: Simplify right side
    21,998x = 1,254,576,400
  5. Step 5: Solve for x
    x = 1,254,576,400/21,998
  6. Step 6: Final answer
    x = 57,031.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.