Home / 11,145.75-15,381.32-6,109.64

Finding the Fourth Proportional to 11,145.75, 15,381.32 and 6,109.64

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Solution

The fourth proportional to 11,145.75, 15,381.32 and 6,109.64 is: 8,431.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,145.75 : 15,381.32 = 6,109.64 : x
  2. Step 2: Convert to fraction form
    11,145.75/15,381.32 = 6,109.64/x
  3. Step 3: Cross multiply
    11,145.75x = 15,381.32 × 6,109.64
  4. Step 4: Simplify right side
    11,145.75x = 93,974,399.04
  5. Step 5: Solve for x
    x = 93,974,399.04/11,145.75
  6. Step 6: Final answer
    x = 8,431.41

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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.