Home / 5,106.55-7,660.35-1,408.78

Finding the Fourth Proportional to 5,106.55, 7,660.35 and 1,408.78

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Solution

The fourth proportional to 5,106.55, 7,660.35 and 1,408.78 is: 2,113.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,106.55 : 7,660.35 = 1,408.78 : x
  2. Step 2: Convert to fraction form
    5,106.55/7,660.35 = 1,408.78/x
  3. Step 3: Cross multiply
    5,106.55x = 7,660.35 × 1,408.78
  4. Step 4: Simplify right side
    5,106.55x = 10,791,747.87
  5. Step 5: Solve for x
    x = 10,791,747.87/5,106.55
  6. Step 6: Final answer
    x = 2,113.31

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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.