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Finding the Fourth Proportional to 7,000.16, 10,493.76 and 3,920

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Solution

The fourth proportional to 7,000.16, 10,493.76 and 3,920 is: 5,876.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,000.16 : 10,493.76 = 3,920 : x
  2. Step 2: Convert to fraction form
    7,000.16/10,493.76 = 3,920/x
  3. Step 3: Cross multiply
    7,000.16x = 10,493.76 × 3,920
  4. Step 4: Simplify right side
    7,000.16x = 41,135,539.20
  5. Step 5: Solve for x
    x = 41,135,539.20/7,000.16
  6. Step 6: Final answer
    x = 5,876.37

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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.