Home / 12,740.20-19,112.10-3,974.20

Finding the Fourth Proportional to 12,740.20, 19,112.10 and 3,974.20

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Solution

The fourth proportional to 12,740.20, 19,112.10 and 3,974.20 is: 5,961.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,740.20 : 19,112.10 = 3,974.20 : x
  2. Step 2: Convert to fraction form
    12,740.20/19,112.10 = 3,974.20/x
  3. Step 3: Cross multiply
    12,740.20x = 19,112.10 × 3,974.20
  4. Step 4: Simplify right side
    12,740.20x = 75,955,307.82
  5. Step 5: Solve for x
    x = 75,955,307.82/12,740.20
  6. Step 6: Final answer
    x = 5,961.86

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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.