Home / 8,390.12-12,589.34-5,940.68

Finding the Fourth Proportional to 8,390.12, 12,589.34 and 5,940.68

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Solution

The fourth proportional to 8,390.12, 12,589.34 and 5,940.68 is: 8,913.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390.12 : 12,589.34 = 5,940.68 : x
  2. Step 2: Convert to fraction form
    8,390.12/12,589.34 = 5,940.68/x
  3. Step 3: Cross multiply
    8,390.12x = 12,589.34 × 5,940.68
  4. Step 4: Simplify right side
    8,390.12x = 74,789,240.35
  5. Step 5: Solve for x
    x = 74,789,240.35/8,390.12
  6. Step 6: Final answer
    x = 8,913.97

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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.