Home / 5,119.71-7,679.57-1,421.94

Finding the Fourth Proportional to 5,119.71, 7,679.57 and 1,421.94

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Solution

The fourth proportional to 5,119.71, 7,679.57 and 1,421.94 is: 2,132.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,119.71 : 7,679.57 = 1,421.94 : x
  2. Step 2: Convert to fraction form
    5,119.71/7,679.57 = 1,421.94/x
  3. Step 3: Cross multiply
    5,119.71x = 7,679.57 × 1,421.94
  4. Step 4: Simplify right side
    5,119.71x = 10,919,908.65
  5. Step 5: Solve for x
    x = 10,919,908.65/5,119.71
  6. Step 6: Final answer
    x = 2,132.91

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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.