Home / 12,129.80-18,201.66-5,109.26

Finding the Fourth Proportional to 12,129.80, 18,201.66 and 5,109.26

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Solution

The fourth proportional to 12,129.80, 18,201.66 and 5,109.26 is: 7,666.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.80 : 18,201.66 = 5,109.26 : x
  2. Step 2: Convert to fraction form
    12,129.80/18,201.66 = 5,109.26/x
  3. Step 3: Cross multiply
    12,129.80x = 18,201.66 × 5,109.26
  4. Step 4: Simplify right side
    12,129.80x = 92,997,013.37
  5. Step 5: Solve for x
    x = 92,997,013.37/12,129.80
  6. Step 6: Final answer
    x = 7,666.82

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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.