Home / 12,738.40-19,109.52-3,974

Finding the Fourth Proportional to 12,738.40, 19,109.52 and 3,974

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Solution

The fourth proportional to 12,738.40, 19,109.52 and 3,974 is: 5,961.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,738.40 : 19,109.52 = 3,974 : x
  2. Step 2: Convert to fraction form
    12,738.40/19,109.52 = 3,974/x
  3. Step 3: Cross multiply
    12,738.40x = 19,109.52 × 3,974
  4. Step 4: Simplify right side
    12,738.40x = 75,941,232.48
  5. Step 5: Solve for x
    x = 75,941,232.48/12,738.40
  6. Step 6: Final answer
    x = 5,961.60

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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.