Home / 11,171.44-15,415.45-6,390.42

Finding the Fourth Proportional to 11,171.44, 15,415.45 and 6,390.42

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Solution

The fourth proportional to 11,171.44, 15,415.45 and 6,390.42 is: 8,818.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,171.44 : 15,415.45 = 6,390.42 : x
  2. Step 2: Convert to fraction form
    11,171.44/15,415.45 = 6,390.42/x
  3. Step 3: Cross multiply
    11,171.44x = 15,415.45 × 6,390.42
  4. Step 4: Simplify right side
    11,171.44x = 98,511,199.99
  5. Step 5: Solve for x
    x = 98,511,199.99/11,171.44
  6. Step 6: Final answer
    x = 8,818.13

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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.