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Finding the Fourth Proportional to 10,622.88, 15,920.52 and 4,375.80

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Solution

The fourth proportional to 10,622.88, 15,920.52 and 4,375.80 is: 6,558.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,622.88 : 15,920.52 = 4,375.80 : x
  2. Step 2: Convert to fraction form
    10,622.88/15,920.52 = 4,375.80/x
  3. Step 3: Cross multiply
    10,622.88x = 15,920.52 × 4,375.80
  4. Step 4: Simplify right side
    10,622.88x = 69,665,011.42
  5. Step 5: Solve for x
    x = 69,665,011.42/10,622.88
  6. Step 6: Final answer
    x = 6,558.02

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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.