Home / 11,187.92-15,420.32-7,644.96

Finding the Fourth Proportional to 11,187.92, 15,420.32 and 7,644.96

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Solution

The fourth proportional to 11,187.92, 15,420.32 and 7,644.96 is: 10,537.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,187.92 : 15,420.32 = 7,644.96 : x
  2. Step 2: Convert to fraction form
    11,187.92/15,420.32 = 7,644.96/x
  3. Step 3: Cross multiply
    11,187.92x = 15,420.32 × 7,644.96
  4. Step 4: Simplify right side
    11,187.92x = 117,887,729.59
  5. Step 5: Solve for x
    x = 117,887,729.59/11,187.92
  6. Step 6: Final answer
    x = 10,537.06

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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.