Home / 13,105.40-18,064.22-11,399.54

Finding the Fourth Proportional to 13,105.40, 18,064.22 and 11,399.54

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Solution

The fourth proportional to 13,105.40, 18,064.22 and 11,399.54 is: 15,712.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,105.40 : 18,064.22 = 11,399.54 : x
  2. Step 2: Convert to fraction form
    13,105.40/18,064.22 = 11,399.54/x
  3. Step 3: Cross multiply
    13,105.40x = 18,064.22 × 11,399.54
  4. Step 4: Simplify right side
    13,105.40x = 205,923,798.46
  5. Step 5: Solve for x
    x = 205,923,798.46/13,105.40
  6. Step 6: Final answer
    x = 15,712.90

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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.