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Finding the Fourth Proportional to 7,921.19, 11,876.98 and 5,453.30

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Solution

The fourth proportional to 7,921.19, 11,876.98 and 5,453.30 is: 8,176.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,921.19 : 11,876.98 = 5,453.30 : x
  2. Step 2: Convert to fraction form
    7,921.19/11,876.98 = 5,453.30/x
  3. Step 3: Cross multiply
    7,921.19x = 11,876.98 × 5,453.30
  4. Step 4: Simplify right side
    7,921.19x = 64,768,735.03
  5. Step 5: Solve for x
    x = 64,768,735.03/7,921.19
  6. Step 6: Final answer
    x = 8,176.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.