Home / 11,415.72-15,753.64-6,379.94

Finding the Fourth Proportional to 11,415.72, 15,753.64 and 6,379.94

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Solution

The fourth proportional to 11,415.72, 15,753.64 and 6,379.94 is: 8,804.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,415.72 : 15,753.64 = 6,379.94 : x
  2. Step 2: Convert to fraction form
    11,415.72/15,753.64 = 6,379.94/x
  3. Step 3: Cross multiply
    11,415.72x = 15,753.64 × 6,379.94
  4. Step 4: Simplify right side
    11,415.72x = 100,507,191.24
  5. Step 5: Solve for x
    x = 100,507,191.24/11,415.72
  6. Step 6: Final answer
    x = 8,804.28

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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.