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Finding the Fourth Proportional to 7,911.02, 11,866.56 and 2,979.34

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Solution

The fourth proportional to 7,911.02, 11,866.56 and 2,979.34 is: 4,469.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.02 : 11,866.56 = 2,979.34 : x
  2. Step 2: Convert to fraction form
    7,911.02/11,866.56 = 2,979.34/x
  3. Step 3: Cross multiply
    7,911.02x = 11,866.56 × 2,979.34
  4. Step 4: Simplify right side
    7,911.02x = 35,354,487.20
  5. Step 5: Solve for x
    x = 35,354,487.20/7,911.02
  6. Step 6: Final answer
    x = 4,469.02

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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.