Home / 8,313.20-12,479.92-3,875.12

Finding the Fourth Proportional to 8,313.20, 12,479.92 and 3,875.12

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Solution

The fourth proportional to 8,313.20, 12,479.92 and 3,875.12 is: 5,817.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,313.20 : 12,479.92 = 3,875.12 : x
  2. Step 2: Convert to fraction form
    8,313.20/12,479.92 = 3,875.12/x
  3. Step 3: Cross multiply
    8,313.20x = 12,479.92 × 3,875.12
  4. Step 4: Simplify right side
    8,313.20x = 48,361,187.59
  5. Step 5: Solve for x
    x = 48,361,187.59/8,313.20
  6. Step 6: Final answer
    x = 5,817.40

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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.