Home / 8,119.35-12,143.84-4,779.64

Finding the Fourth Proportional to 8,119.35, 12,143.84 and 4,779.64

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Solution

The fourth proportional to 8,119.35, 12,143.84 and 4,779.64 is: 7,148.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,119.35 : 12,143.84 = 4,779.64 : x
  2. Step 2: Convert to fraction form
    8,119.35/12,143.84 = 4,779.64/x
  3. Step 3: Cross multiply
    8,119.35x = 12,143.84 × 4,779.64
  4. Step 4: Simplify right side
    8,119.35x = 58,043,098.80
  5. Step 5: Solve for x
    x = 58,043,098.80/8,119.35
  6. Step 6: Final answer
    x = 7,148.74

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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.