Home / 21,315.32-29,414.56-13,361.88

Finding the Fourth Proportional to 21,315.32, 29,414.56 and 13,361.88

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Solution

The fourth proportional to 21,315.32, 29,414.56 and 13,361.88 is: 18,439.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.32 : 29,414.56 = 13,361.88 : x
  2. Step 2: Convert to fraction form
    21,315.32/29,414.56 = 13,361.88/x
  3. Step 3: Cross multiply
    21,315.32x = 29,414.56 × 13,361.88
  4. Step 4: Simplify right side
    21,315.32x = 393,033,820.97
  5. Step 5: Solve for x
    x = 393,033,820.97/21,315.32
  6. Step 6: Final answer
    x = 18,439.03

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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.