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Finding the Fourth Proportional to 28,139.67, 38,836.41 and 16,203.51

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Solution

The fourth proportional to 28,139.67, 38,836.41 and 16,203.51 is: 22,362.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,139.67 : 38,836.41 = 16,203.51 : x
  2. Step 2: Convert to fraction form
    28,139.67/38,836.41 = 16,203.51/x
  3. Step 3: Cross multiply
    28,139.67x = 38,836.41 × 16,203.51
  4. Step 4: Simplify right side
    28,139.67x = 629,286,157.80
  5. Step 5: Solve for x
    x = 629,286,157.80/28,139.67
  6. Step 6: Final answer
    x = 22,362.95

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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.