Home / 11,005.21-15,186.88-6,289.48

Finding the Fourth Proportional to 11,005.21, 15,186.88 and 6,289.48

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Solution

The fourth proportional to 11,005.21, 15,186.88 and 6,289.48 is: 8,679.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,005.21 : 15,186.88 = 6,289.48 : x
  2. Step 2: Convert to fraction form
    11,005.21/15,186.88 = 6,289.48/x
  3. Step 3: Cross multiply
    11,005.21x = 15,186.88 × 6,289.48
  4. Step 4: Simplify right side
    11,005.21x = 95,517,578.02
  5. Step 5: Solve for x
    x = 95,517,578.02/11,005.21
  6. Step 6: Final answer
    x = 8,679.31

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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.