Home / 8,318.86-12,478.26-3,387.40

Finding the Fourth Proportional to 8,318.86, 12,478.26 and 3,387.40

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Solution

The fourth proportional to 8,318.86, 12,478.26 and 3,387.40 is: 5,081.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,318.86 : 12,478.26 = 3,387.40 : x
  2. Step 2: Convert to fraction form
    8,318.86/12,478.26 = 3,387.40/x
  3. Step 3: Cross multiply
    8,318.86x = 12,478.26 × 3,387.40
  4. Step 4: Simplify right side
    8,318.86x = 42,268,857.92
  5. Step 5: Solve for x
    x = 42,268,857.92/8,318.86
  6. Step 6: Final answer
    x = 5,081.09

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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.