Home / 8,138.18-12,202.95-3,978.92

Finding the Fourth Proportional to 8,138.18, 12,202.95 and 3,978.92

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Solution

The fourth proportional to 8,138.18, 12,202.95 and 3,978.92 is: 5,966.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,138.18 : 12,202.95 = 3,978.92 : x
  2. Step 2: Convert to fraction form
    8,138.18/12,202.95 = 3,978.92/x
  3. Step 3: Cross multiply
    8,138.18x = 12,202.95 × 3,978.92
  4. Step 4: Simplify right side
    8,138.18x = 48,554,561.81
  5. Step 5: Solve for x
    x = 48,554,561.81/8,138.18
  6. Step 6: Final answer
    x = 5,966.27

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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.