Home / 12,640.07-18,945.83-7,698.87

Finding the Fourth Proportional to 12,640.07, 18,945.83 and 7,698.87

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Solution

The fourth proportional to 12,640.07, 18,945.83 and 7,698.87 is: 11,539.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.07 : 18,945.83 = 7,698.87 : x
  2. Step 2: Convert to fraction form
    12,640.07/18,945.83 = 7,698.87/x
  3. Step 3: Cross multiply
    12,640.07x = 18,945.83 × 7,698.87
  4. Step 4: Simplify right side
    12,640.07x = 145,861,501.46
  5. Step 5: Solve for x
    x = 145,861,501.46/12,640.07
  6. Step 6: Final answer
    x = 11,539.61

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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.