Home / 13,120.66-19,681.68-3,759.79

Finding the Fourth Proportional to 13,120.66, 19,681.68 and 3,759.79

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Solution

The fourth proportional to 13,120.66, 19,681.68 and 3,759.79 is: 5,639.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,120.66 : 19,681.68 = 3,759.79 : x
  2. Step 2: Convert to fraction form
    13,120.66/19,681.68 = 3,759.79/x
  3. Step 3: Cross multiply
    13,120.66x = 19,681.68 × 3,759.79
  4. Step 4: Simplify right side
    13,120.66x = 73,998,983.65
  5. Step 5: Solve for x
    x = 73,998,983.65/13,120.66
  6. Step 6: Final answer
    x = 5,639.88

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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.