Home / 13,119.75-19,679.63-3,885.75

Finding the Fourth Proportional to 13,119.75, 19,679.63 and 3,885.75

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Solution

The fourth proportional to 13,119.75, 19,679.63 and 3,885.75 is: 5,828.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.75 : 19,679.63 = 3,885.75 : x
  2. Step 2: Convert to fraction form
    13,119.75/19,679.63 = 3,885.75/x
  3. Step 3: Cross multiply
    13,119.75x = 19,679.63 × 3,885.75
  4. Step 4: Simplify right side
    13,119.75x = 76,470,102.84
  5. Step 5: Solve for x
    x = 76,470,102.84/13,119.75
  6. Step 6: Final answer
    x = 5,828.63

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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.