Home / 28,318.64-39,022.14-21,906.29

Finding the Fourth Proportional to 28,318.64, 39,022.14 and 21,906.29

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Solution

The fourth proportional to 28,318.64, 39,022.14 and 21,906.29 is: 30,186.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,318.64 : 39,022.14 = 21,906.29 : x
  2. Step 2: Convert to fraction form
    28,318.64/39,022.14 = 21,906.29/x
  3. Step 3: Cross multiply
    28,318.64x = 39,022.14 × 21,906.29
  4. Step 4: Simplify right side
    28,318.64x = 854,830,120.15
  5. Step 5: Solve for x
    x = 854,830,120.15/28,318.64
  6. Step 6: Final answer
    x = 30,186.13

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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.