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Finding the Fourth Proportional to 11,920.79, 17,882.81 and 4,526.03

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Solution

The fourth proportional to 11,920.79, 17,882.81 and 4,526.03 is: 6,789.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,920.79 : 17,882.81 = 4,526.03 : x
  2. Step 2: Convert to fraction form
    11,920.79/17,882.81 = 4,526.03/x
  3. Step 3: Cross multiply
    11,920.79x = 17,882.81 × 4,526.03
  4. Step 4: Simplify right side
    11,920.79x = 80,938,022.50
  5. Step 5: Solve for x
    x = 80,938,022.50/11,920.79
  6. Step 6: Final answer
    x = 6,789.66

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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.