Home / 28,201.14-42,243.30-12,629.70

Finding the Fourth Proportional to 28,201.14, 42,243.30 and 12,629.70

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Solution

The fourth proportional to 28,201.14, 42,243.30 and 12,629.70 is: 18,918.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,201.14 : 42,243.30 = 12,629.70 : x
  2. Step 2: Convert to fraction form
    28,201.14/42,243.30 = 12,629.70/x
  3. Step 3: Cross multiply
    28,201.14x = 42,243.30 × 12,629.70
  4. Step 4: Simplify right side
    28,201.14x = 533,520,206.01
  5. Step 5: Solve for x
    x = 533,520,206.01/28,201.14
  6. Step 6: Final answer
    x = 18,918.39

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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.