Home / 5,120.92-7,681.11-1,423.36

Finding the Fourth Proportional to 5,120.92, 7,681.11 and 1,423.36

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Solution

The fourth proportional to 5,120.92, 7,681.11 and 1,423.36 is: 2,134.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,120.92 : 7,681.11 = 1,423.36 : x
  2. Step 2: Convert to fraction form
    5,120.92/7,681.11 = 1,423.36/x
  3. Step 3: Cross multiply
    5,120.92x = 7,681.11 × 1,423.36
  4. Step 4: Simplify right side
    5,120.92x = 10,932,984.73
  5. Step 5: Solve for x
    x = 10,932,984.73/5,120.92
  6. Step 6: Final answer
    x = 2,134.96

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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.