Home / 21,720.33-29,977.27-13,763.29

Finding the Fourth Proportional to 21,720.33, 29,977.27 and 13,763.29

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Solution

The fourth proportional to 21,720.33, 29,977.27 and 13,763.29 is: 18,995.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,720.33 : 29,977.27 = 13,763.29 : x
  2. Step 2: Convert to fraction form
    21,720.33/29,977.27 = 13,763.29/x
  3. Step 3: Cross multiply
    21,720.33x = 29,977.27 × 13,763.29
  4. Step 4: Simplify right side
    21,720.33x = 412,585,860.42
  5. Step 5: Solve for x
    x = 412,585,860.42/21,720.33
  6. Step 6: Final answer
    x = 18,995.38

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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.