Home / 13,149.90-18,146.97-7,485.09

Finding the Fourth Proportional to 13,149.90, 18,146.97 and 7,485.09

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Solution

The fourth proportional to 13,149.90, 18,146.97 and 7,485.09 is: 10,329.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.90 : 18,146.97 = 7,485.09 : x
  2. Step 2: Convert to fraction form
    13,149.90/18,146.97 = 7,485.09/x
  3. Step 3: Cross multiply
    13,149.90x = 18,146.97 × 7,485.09
  4. Step 4: Simplify right side
    13,149.90x = 135,831,703.68
  5. Step 5: Solve for x
    x = 135,831,703.68/13,149.90
  6. Step 6: Final answer
    x = 10,329.49

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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.