Home / 28,930.10-43,384.35-20,138.90

Finding the Fourth Proportional to 28,930.10, 43,384.35 and 20,138.90

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Solution

The fourth proportional to 28,930.10, 43,384.35 and 20,138.90 is: 30,200.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,930.10 : 43,384.35 = 20,138.90 : x
  2. Step 2: Convert to fraction form
    28,930.10/43,384.35 = 20,138.90/x
  3. Step 3: Cross multiply
    28,930.10x = 43,384.35 × 20,138.90
  4. Step 4: Simplify right side
    28,930.10x = 873,713,086.22
  5. Step 5: Solve for x
    x = 873,713,086.22/28,930.10
  6. Step 6: Final answer
    x = 30,200.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.