Home / 28,021.52-38,672.42-20,935.64

Finding the Fourth Proportional to 28,021.52, 38,672.42 and 20,935.64

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Solution

The fourth proportional to 28,021.52, 38,672.42 and 20,935.64 is: 28,893.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,021.52 : 38,672.42 = 20,935.64 : x
  2. Step 2: Convert to fraction form
    28,021.52/38,672.42 = 20,935.64/x
  3. Step 3: Cross multiply
    28,021.52x = 38,672.42 × 20,935.64
  4. Step 4: Simplify right side
    28,021.52x = 809,631,565.01
  5. Step 5: Solve for x
    x = 809,631,565.01/28,021.52
  6. Step 6: Final answer
    x = 28,893.21

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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.