Home / 8,639.36-12,957.12-3,640.96

Finding the Fourth Proportional to 8,639.36, 12,957.12 and 3,640.96

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Solution

The fourth proportional to 8,639.36, 12,957.12 and 3,640.96 is: 5,460.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.36 : 12,957.12 = 3,640.96 : x
  2. Step 2: Convert to fraction form
    8,639.36/12,957.12 = 3,640.96/x
  3. Step 3: Cross multiply
    8,639.36x = 12,957.12 × 3,640.96
  4. Step 4: Simplify right side
    8,639.36x = 47,176,355.64
  5. Step 5: Solve for x
    x = 47,176,355.64/8,639.36
  6. Step 6: Final answer
    x = 5,460.63

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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.