Home / 12,640.36-17,448.48-9,505.60

Finding the Fourth Proportional to 12,640.36, 17,448.48 and 9,505.60

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Solution

The fourth proportional to 12,640.36, 17,448.48 and 9,505.60 is: 13,121.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.36 : 17,448.48 = 9,505.60 : x
  2. Step 2: Convert to fraction form
    12,640.36/17,448.48 = 9,505.60/x
  3. Step 3: Cross multiply
    12,640.36x = 17,448.48 × 9,505.60
  4. Step 4: Simplify right side
    12,640.36x = 165,858,271.49
  5. Step 5: Solve for x
    x = 165,858,271.49/12,640.36
  6. Step 6: Final answer
    x = 13,121.32

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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.