Home / 8,139.88-12,207.36-3,459.83

Finding the Fourth Proportional to 8,139.88, 12,207.36 and 3,459.83

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Solution

The fourth proportional to 8,139.88, 12,207.36 and 3,459.83 is: 5,188.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.88 : 12,207.36 = 3,459.83 : x
  2. Step 2: Convert to fraction form
    8,139.88/12,207.36 = 3,459.83/x
  3. Step 3: Cross multiply
    8,139.88x = 12,207.36 × 3,459.83
  4. Step 4: Simplify right side
    8,139.88x = 42,235,390.35
  5. Step 5: Solve for x
    x = 42,235,390.35/8,139.88
  6. Step 6: Final answer
    x = 5,188.70

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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.