Home / 28,729.14-39,672.36-21,643.26

Finding the Fourth Proportional to 28,729.14, 39,672.36 and 21,643.26

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Solution

The fourth proportional to 28,729.14, 39,672.36 and 21,643.26 is: 29,887.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,729.14 : 39,672.36 = 21,643.26 : x
  2. Step 2: Convert to fraction form
    28,729.14/39,672.36 = 21,643.26/x
  3. Step 3: Cross multiply
    28,729.14x = 39,672.36 × 21,643.26
  4. Step 4: Simplify right side
    28,729.14x = 858,639,202.29
  5. Step 5: Solve for x
    x = 858,639,202.29/28,729.14
  6. Step 6: Final answer
    x = 29,887.40

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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.