Home / 8,428.96-12,639.76-4,479.27

Finding the Fourth Proportional to 8,428.96, 12,639.76 and 4,479.27

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Solution

The fourth proportional to 8,428.96, 12,639.76 and 4,479.27 is: 6,716.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,428.96 : 12,639.76 = 4,479.27 : x
  2. Step 2: Convert to fraction form
    8,428.96/12,639.76 = 4,479.27/x
  3. Step 3: Cross multiply
    8,428.96x = 12,639.76 × 4,479.27
  4. Step 4: Simplify right side
    8,428.96x = 56,616,812.18
  5. Step 5: Solve for x
    x = 56,616,812.18/8,428.96
  6. Step 6: Final answer
    x = 6,716.94

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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.