Home / 11,945.80-16,485.79-6,640.50

Finding the Fourth Proportional to 11,945.80, 16,485.79 and 6,640.50

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Solution

The fourth proportional to 11,945.80, 16,485.79 and 6,640.50 is: 9,164.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,945.80 : 16,485.79 = 6,640.50 : x
  2. Step 2: Convert to fraction form
    11,945.80/16,485.79 = 6,640.50/x
  3. Step 3: Cross multiply
    11,945.80x = 16,485.79 × 6,640.50
  4. Step 4: Simplify right side
    11,945.80x = 109,473,871.89
  5. Step 5: Solve for x
    x = 109,473,871.89/11,945.80
  6. Step 6: Final answer
    x = 9,164.22

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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.