Home / 28,268.68-39,047.52-21,513.28

Finding the Fourth Proportional to 28,268.68, 39,047.52 and 21,513.28

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Solution

The fourth proportional to 28,268.68, 39,047.52 and 21,513.28 is: 29,716.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,268.68 : 39,047.52 = 21,513.28 : x
  2. Step 2: Convert to fraction form
    28,268.68/39,047.52 = 21,513.28/x
  3. Step 3: Cross multiply
    28,268.68x = 39,047.52 × 21,513.28
  4. Step 4: Simplify right side
    28,268.68x = 840,040,231.07
  5. Step 5: Solve for x
    x = 840,040,231.07/28,268.68
  6. Step 6: Final answer
    x = 29,716.29

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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.