Home / 10,821.20-16,231.80-4,677.20

Finding the Fourth Proportional to 10,821.20, 16,231.80 and 4,677.20

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Solution

The fourth proportional to 10,821.20, 16,231.80 and 4,677.20 is: 7,015.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,821.20 : 16,231.80 = 4,677.20 : x
  2. Step 2: Convert to fraction form
    10,821.20/16,231.80 = 4,677.20/x
  3. Step 3: Cross multiply
    10,821.20x = 16,231.80 × 4,677.20
  4. Step 4: Simplify right side
    10,821.20x = 75,919,374.96
  5. Step 5: Solve for x
    x = 75,919,374.96/10,821.20
  6. Step 6: Final answer
    x = 7,015.80

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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.