Home / 21,100.26-29,120.40-14,028.96

Finding the Fourth Proportional to 21,100.26, 29,120.40 and 14,028.96

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Solution

The fourth proportional to 21,100.26, 29,120.40 and 14,028.96 is: 19,361.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,100.26 : 29,120.40 = 14,028.96 : x
  2. Step 2: Convert to fraction form
    21,100.26/29,120.40 = 14,028.96/x
  3. Step 3: Cross multiply
    21,100.26x = 29,120.40 × 14,028.96
  4. Step 4: Simplify right side
    21,100.26x = 408,528,926.78
  5. Step 5: Solve for x
    x = 408,528,926.78/21,100.26
  6. Step 6: Final answer
    x = 19,361.32

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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.