Home / 11,945.79-16,485.75-6,640.69

Finding the Fourth Proportional to 11,945.79, 16,485.75 and 6,640.69

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Solution

The fourth proportional to 11,945.79, 16,485.75 and 6,640.69 is: 9,164.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,945.79 : 16,485.75 = 6,640.69 : x
  2. Step 2: Convert to fraction form
    11,945.79/16,485.75 = 6,640.69/x
  3. Step 3: Cross multiply
    11,945.79x = 16,485.75 × 6,640.69
  4. Step 4: Simplify right side
    11,945.79x = 109,476,755.17
  5. Step 5: Solve for x
    x = 109,476,755.17/11,945.79
  6. Step 6: Final answer
    x = 9,164.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.