Home / 5,105.65-7,658.51-1,408.08

Finding the Fourth Proportional to 5,105.65, 7,658.51 and 1,408.08

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Solution

The fourth proportional to 5,105.65, 7,658.51 and 1,408.08 is: 2,112.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,105.65 : 7,658.51 = 1,408.08 : x
  2. Step 2: Convert to fraction form
    5,105.65/7,658.51 = 1,408.08/x
  3. Step 3: Cross multiply
    5,105.65x = 7,658.51 × 1,408.08
  4. Step 4: Simplify right side
    5,105.65x = 10,783,794.76
  5. Step 5: Solve for x
    x = 10,783,794.76/5,105.65
  6. Step 6: Final answer
    x = 2,112.13

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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.