Home / 28,125.80-42,198.30-12,548.20

Finding the Fourth Proportional to 28,125.80, 42,198.30 and 12,548.20

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Solution

The fourth proportional to 28,125.80, 42,198.30 and 12,548.20 is: 18,826.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,125.80 : 42,198.30 = 12,548.20 : x
  2. Step 2: Convert to fraction form
    28,125.80/42,198.30 = 12,548.20/x
  3. Step 3: Cross multiply
    28,125.80x = 42,198.30 × 12,548.20
  4. Step 4: Simplify right side
    28,125.80x = 529,512,708.06
  5. Step 5: Solve for x
    x = 529,512,708.06/28,125.80
  6. Step 6: Final answer
    x = 18,826.58

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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.