Home / 18,120.36-27,136.80-10,305.48

Finding the Fourth Proportional to 18,120.36, 27,136.80 and 10,305.48

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Solution

The fourth proportional to 18,120.36, 27,136.80 and 10,305.48 is: 15,433.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.36 : 27,136.80 = 10,305.48 : x
  2. Step 2: Convert to fraction form
    18,120.36/27,136.80 = 10,305.48/x
  3. Step 3: Cross multiply
    18,120.36x = 27,136.80 × 10,305.48
  4. Step 4: Simplify right side
    18,120.36x = 279,657,749.66
  5. Step 5: Solve for x
    x = 279,657,749.66/18,120.36
  6. Step 6: Final answer
    x = 15,433.34

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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.