Home / 21,361.45-29,480.43-15,722.02

Finding the Fourth Proportional to 21,361.45, 29,480.43 and 15,722.02

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Solution

The fourth proportional to 21,361.45, 29,480.43 and 15,722.02 is: 21,697.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,361.45 : 29,480.43 = 15,722.02 : x
  2. Step 2: Convert to fraction form
    21,361.45/29,480.43 = 15,722.02/x
  3. Step 3: Cross multiply
    21,361.45x = 29,480.43 × 15,722.02
  4. Step 4: Simplify right side
    21,361.45x = 463,491,910.07
  5. Step 5: Solve for x
    x = 463,491,910.07/21,361.45
  6. Step 6: Final answer
    x = 21,697.59

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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.