Home / 11,172.11-15,416.55-6,391.09

Finding the Fourth Proportional to 11,172.11, 15,416.55 and 6,391.09

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Solution

The fourth proportional to 11,172.11, 15,416.55 and 6,391.09 is: 8,819.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,172.11 : 15,416.55 = 6,391.09 : x
  2. Step 2: Convert to fraction form
    11,172.11/15,416.55 = 6,391.09/x
  3. Step 3: Cross multiply
    11,172.11x = 15,416.55 × 6,391.09
  4. Step 4: Simplify right side
    11,172.11x = 98,528,520.00
  5. Step 5: Solve for x
    x = 98,528,520.00/11,172.11
  6. Step 6: Final answer
    x = 8,819.15

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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.