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Finding the Fourth Proportional to 7,581.78, 11,354.97 and 7,319.01

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Solution

The fourth proportional to 7,581.78, 11,354.97 and 7,319.01 is: 10,961.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,581.78 : 11,354.97 = 7,319.01 : x
  2. Step 2: Convert to fraction form
    7,581.78/11,354.97 = 7,319.01/x
  3. Step 3: Cross multiply
    7,581.78x = 11,354.97 × 7,319.01
  4. Step 4: Simplify right side
    7,581.78x = 83,107,138.98
  5. Step 5: Solve for x
    x = 83,107,138.98/7,581.78
  6. Step 6: Final answer
    x = 10,961.43

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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.