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Finding the Fourth Proportional to 10,604.40, 15,912 and 4,369.20

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Solution

The fourth proportional to 10,604.40, 15,912 and 4,369.20 is: 6,556.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,604.40 : 15,912 = 4,369.20 : x
  2. Step 2: Convert to fraction form
    10,604.40/15,912 = 4,369.20/x
  3. Step 3: Cross multiply
    10,604.40x = 15,912 × 4,369.20
  4. Step 4: Simplify right side
    10,604.40x = 69,522,710.40
  5. Step 5: Solve for x
    x = 69,522,710.40/10,604.40
  6. Step 6: Final answer
    x = 6,556.02

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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.