Home / 12,442.38-17,172.72-7,138.95

Finding the Fourth Proportional to 12,442.38, 17,172.72 and 7,138.95

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Solution

The fourth proportional to 12,442.38, 17,172.72 and 7,138.95 is: 9,853.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,442.38 : 17,172.72 = 7,138.95 : x
  2. Step 2: Convert to fraction form
    12,442.38/17,172.72 = 7,138.95/x
  3. Step 3: Cross multiply
    12,442.38x = 17,172.72 × 7,138.95
  4. Step 4: Simplify right side
    12,442.38x = 122,595,189.44
  5. Step 5: Solve for x
    x = 122,595,189.44/12,442.38
  6. Step 6: Final answer
    x = 9,853.03

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1.5x scale

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.