Home / 12,640.32-18,962.70-4,318.38

Finding the Fourth Proportional to 12,640.32, 18,962.70 and 4,318.38

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Solution

The fourth proportional to 12,640.32, 18,962.70 and 4,318.38 is: 6,478.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.32 : 18,962.70 = 4,318.38 : x
  2. Step 2: Convert to fraction form
    12,640.32/18,962.70 = 4,318.38/x
  3. Step 3: Cross multiply
    12,640.32x = 18,962.70 × 4,318.38
  4. Step 4: Simplify right side
    12,640.32x = 81,888,144.43
  5. Step 5: Solve for x
    x = 81,888,144.43/12,640.32
  6. Step 6: Final answer
    x = 6,478.33

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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.