Home / 20,140.30-27,795.36-11,187.64

Finding the Fourth Proportional to 20,140.30, 27,795.36 and 11,187.64

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Solution

The fourth proportional to 20,140.30, 27,795.36 and 11,187.64 is: 15,439.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,140.30 : 27,795.36 = 11,187.64 : x
  2. Step 2: Convert to fraction form
    20,140.30/27,795.36 = 11,187.64/x
  3. Step 3: Cross multiply
    20,140.30x = 27,795.36 × 11,187.64
  4. Step 4: Simplify right side
    20,140.30x = 310,964,481.35
  5. Step 5: Solve for x
    x = 310,964,481.35/20,140.30
  6. Step 6: Final answer
    x = 15,439.91

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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.