Home / 28,780.20-39,716.64-16,205.04

Finding the Fourth Proportional to 28,780.20, 39,716.64 and 16,205.04

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Solution

The fourth proportional to 28,780.20, 39,716.64 and 16,205.04 is: 22,362.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,780.20 : 39,716.64 = 16,205.04 : x
  2. Step 2: Convert to fraction form
    28,780.20/39,716.64 = 16,205.04/x
  3. Step 3: Cross multiply
    28,780.20x = 39,716.64 × 16,205.04
  4. Step 4: Simplify right side
    28,780.20x = 643,609,739.87
  5. Step 5: Solve for x
    x = 643,609,739.87/28,780.20
  6. Step 6: Final answer
    x = 22,362.93

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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.