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Finding the Fourth Proportional to 9,920.20, 14,869.80 and 3,676.20

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Solution

The fourth proportional to 9,920.20, 14,869.80 and 3,676.20 is: 5,510.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,920.20 : 14,869.80 = 3,676.20 : x
  2. Step 2: Convert to fraction form
    9,920.20/14,869.80 = 3,676.20/x
  3. Step 3: Cross multiply
    9,920.20x = 14,869.80 × 3,676.20
  4. Step 4: Simplify right side
    9,920.20x = 54,664,358.76
  5. Step 5: Solve for x
    x = 54,664,358.76/9,920.20
  6. Step 6: Final answer
    x = 5,510.41

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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.