Home / 13,119.66-19,680.18-3,758.79

Finding the Fourth Proportional to 13,119.66, 19,680.18 and 3,758.79

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Solution

The fourth proportional to 13,119.66, 19,680.18 and 3,758.79 is: 5,638.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.66 : 19,680.18 = 3,758.79 : x
  2. Step 2: Convert to fraction form
    13,119.66/19,680.18 = 3,758.79/x
  3. Step 3: Cross multiply
    13,119.66x = 19,680.18 × 3,758.79
  4. Step 4: Simplify right side
    13,119.66x = 73,973,701.10
  5. Step 5: Solve for x
    x = 73,973,701.10/13,119.66
  6. Step 6: Final answer
    x = 5,638.38

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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.