Home / 28,816.20-39,770.73-20,855.52

Finding the Fourth Proportional to 28,816.20, 39,770.73 and 20,855.52

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Solution

The fourth proportional to 28,816.20, 39,770.73 and 20,855.52 is: 28,783.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,816.20 : 39,770.73 = 20,855.52 : x
  2. Step 2: Convert to fraction form
    28,816.20/39,770.73 = 20,855.52/x
  3. Step 3: Cross multiply
    28,816.20x = 39,770.73 × 20,855.52
  4. Step 4: Simplify right side
    28,816.20x = 829,439,254.93
  5. Step 5: Solve for x
    x = 829,439,254.93/28,816.20
  6. Step 6: Final answer
    x = 28,783.78

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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.