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Finding the Fourth Proportional to 7,940.79, 11,911.20 and 2,394.09

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Solution

The fourth proportional to 7,940.79, 11,911.20 and 2,394.09 is: 3,591.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,940.79 : 11,911.20 = 2,394.09 : x
  2. Step 2: Convert to fraction form
    7,940.79/11,911.20 = 2,394.09/x
  3. Step 3: Cross multiply
    7,940.79x = 11,911.20 × 2,394.09
  4. Step 4: Simplify right side
    7,940.79x = 28,516,484.81
  5. Step 5: Solve for x
    x = 28,516,484.81/7,940.79
  6. Step 6: Final answer
    x = 3,591.14

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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.