Home / 20,015.13-27,615.90-11,399.37

Finding the Fourth Proportional to 20,015.13, 27,615.90 and 11,399.37

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Solution

The fourth proportional to 20,015.13, 27,615.90 and 11,399.37 is: 15,728.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,015.13 : 27,615.90 = 11,399.37 : x
  2. Step 2: Convert to fraction form
    20,015.13/27,615.90 = 11,399.37/x
  3. Step 3: Cross multiply
    20,015.13x = 27,615.90 × 11,399.37
  4. Step 4: Simplify right side
    20,015.13x = 314,803,861.98
  5. Step 5: Solve for x
    x = 314,803,861.98/20,015.13
  6. Step 6: Final answer
    x = 15,728.29

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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.