Home / 11,005.12-15,189.96-6,816.88

Finding the Fourth Proportional to 11,005.12, 15,189.96 and 6,816.88

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Solution

The fourth proportional to 11,005.12, 15,189.96 and 6,816.88 is: 9,409.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,005.12 : 15,189.96 = 6,816.88 : x
  2. Step 2: Convert to fraction form
    11,005.12/15,189.96 = 6,816.88/x
  3. Step 3: Cross multiply
    11,005.12x = 15,189.96 × 6,816.88
  4. Step 4: Simplify right side
    11,005.12x = 103,548,134.52
  5. Step 5: Solve for x
    x = 103,548,134.52/11,005.12
  6. Step 6: Final answer
    x = 9,409.09

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Half scale
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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.