Home / 8,428.10-12,639.06-2,879.96

Finding the Fourth Proportional to 8,428.10, 12,639.06 and 2,879.96

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Solution

The fourth proportional to 8,428.10, 12,639.06 and 2,879.96 is: 4,318.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.10 : 12,639.06 = 2,879.96 : x
  2. Step 2: Convert to fraction form
    8,428.10/12,639.06 = 2,879.96/x
  3. Step 3: Cross multiply
    8,428.10x = 12,639.06 × 2,879.96
  4. Step 4: Simplify right side
    8,428.10x = 36,399,924.04
  5. Step 5: Solve for x
    x = 36,399,924.04/8,428.10
  6. Step 6: Final answer
    x = 4,318.88

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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.