Home / 28,380.20-39,164.66-15,804.95

Finding the Fourth Proportional to 28,380.20, 39,164.66 and 15,804.95

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Solution

The fourth proportional to 28,380.20, 39,164.66 and 15,804.95 is: 21,810.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.20 : 39,164.66 = 15,804.95 : x
  2. Step 2: Convert to fraction form
    28,380.20/39,164.66 = 15,804.95/x
  3. Step 3: Cross multiply
    28,380.20x = 39,164.66 × 15,804.95
  4. Step 4: Simplify right side
    28,380.20x = 618,995,218.22
  5. Step 5: Solve for x
    x = 618,995,218.22/28,380.20
  6. Step 6: Final answer
    x = 21,810.82

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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.