Home / 28,405.11-39,200.78-15,829.83

Finding the Fourth Proportional to 28,405.11, 39,200.78 and 15,829.83

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Solution

The fourth proportional to 28,405.11, 39,200.78 and 15,829.83 is: 21,846.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,405.11 : 39,200.78 = 15,829.83 : x
  2. Step 2: Convert to fraction form
    28,405.11/39,200.78 = 15,829.83/x
  3. Step 3: Cross multiply
    28,405.11x = 39,200.78 × 15,829.83
  4. Step 4: Simplify right side
    28,405.11x = 620,541,604.12
  5. Step 5: Solve for x
    x = 620,541,604.12/28,405.11
  6. Step 6: Final answer
    x = 21,846.13

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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.