Home / 11,163.12-15,405.30-6,447.60

Finding the Fourth Proportional to 11,163.12, 15,405.30 and 6,447.60

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Solution

The fourth proportional to 11,163.12, 15,405.30 and 6,447.60 is: 8,897.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,163.12 : 15,405.30 = 6,447.60 : x
  2. Step 2: Convert to fraction form
    11,163.12/15,405.30 = 6,447.60/x
  3. Step 3: Cross multiply
    11,163.12x = 15,405.30 × 6,447.60
  4. Step 4: Simplify right side
    11,163.12x = 99,327,212.28
  5. Step 5: Solve for x
    x = 99,327,212.28/11,163.12
  6. Step 6: Final answer
    x = 8,897.80

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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.