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Finding the Fourth Proportional to 7,419.93, 11,129.90 and 2,979.63

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Solution

The fourth proportional to 7,419.93, 11,129.90 and 2,979.63 is: 4,469.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,419.93 : 11,129.90 = 2,979.63 : x
  2. Step 2: Convert to fraction form
    7,419.93/11,129.90 = 2,979.63/x
  3. Step 3: Cross multiply
    7,419.93x = 11,129.90 × 2,979.63
  4. Step 4: Simplify right side
    7,419.93x = 33,162,969.04
  5. Step 5: Solve for x
    x = 33,162,969.04/7,419.93
  6. Step 6: Final answer
    x = 4,469.45

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Similar ratio
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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.