Home / 5,685.75-8,520.39-3,215.34

Finding the Fourth Proportional to 5,685.75, 8,520.39 and 3,215.34

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Solution

The fourth proportional to 5,685.75, 8,520.39 and 3,215.34 is: 4,818.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,685.75 : 8,520.39 = 3,215.34 : x
  2. Step 2: Convert to fraction form
    5,685.75/8,520.39 = 3,215.34/x
  3. Step 3: Cross multiply
    5,685.75x = 8,520.39 × 3,215.34
  4. Step 4: Simplify right side
    5,685.75x = 27,395,950.78
  5. Step 5: Solve for x
    x = 27,395,950.78/5,685.75
  6. Step 6: Final answer
    x = 4,818.35

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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.