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Finding the Fourth Proportional to 10,979.40, 16,469.10 and 2,771.40

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Solution

The fourth proportional to 10,979.40, 16,469.10 and 2,771.40 is: 4,157.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,979.40 : 16,469.10 = 2,771.40 : x
  2. Step 2: Convert to fraction form
    10,979.40/16,469.10 = 2,771.40/x
  3. Step 3: Cross multiply
    10,979.40x = 16,469.10 × 2,771.40
  4. Step 4: Simplify right side
    10,979.40x = 45,642,463.74
  5. Step 5: Solve for x
    x = 45,642,463.74/10,979.40
  6. Step 6: Final answer
    x = 4,157.10

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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.