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Finding the Fourth Proportional to 7,614, 11,421.20 and 2,419.88

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Solution

The fourth proportional to 7,614, 11,421.20 and 2,419.88 is: 3,629.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,614 : 11,421.20 = 2,419.88 : x
  2. Step 2: Convert to fraction form
    7,614/11,421.20 = 2,419.88/x
  3. Step 3: Cross multiply
    7,614x = 11,421.20 × 2,419.88
  4. Step 4: Simplify right side
    7,614x = 27,637,882.40
  5. Step 5: Solve for x
    x = 27,637,882.40/7,614
  6. Step 6: Final answer
    x = 3,629.88

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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.