Home / 28,012.20-42,020.46-8,290.44

Finding the Fourth Proportional to 28,012.20, 42,020.46 and 8,290.44

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Solution

The fourth proportional to 28,012.20, 42,020.46 and 8,290.44 is: 12,436.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,012.20 : 42,020.46 = 8,290.44 : x
  2. Step 2: Convert to fraction form
    28,012.20/42,020.46 = 8,290.44/x
  3. Step 3: Cross multiply
    28,012.20x = 42,020.46 × 8,290.44
  4. Step 4: Simplify right side
    28,012.20x = 348,368,102.40
  5. Step 5: Solve for x
    x = 348,368,102.40/28,012.20
  6. Step 6: Final answer
    x = 12,436.30

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1.5x scale

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.