Home / 13,785.36-19,022.76-8,120.60

Finding the Fourth Proportional to 13,785.36, 19,022.76 and 8,120.60

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Solution

The fourth proportional to 13,785.36, 19,022.76 and 8,120.60 is: 11,205.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,785.36 : 19,022.76 = 8,120.60 : x
  2. Step 2: Convert to fraction form
    13,785.36/19,022.76 = 8,120.60/x
  3. Step 3: Cross multiply
    13,785.36x = 19,022.76 × 8,120.60
  4. Step 4: Simplify right side
    13,785.36x = 154,476,224.86
  5. Step 5: Solve for x
    x = 154,476,224.86/13,785.36
  6. Step 6: Final answer
    x = 11,205.82

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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.