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Finding the Fourth Proportional to 9,920.64, 14,880 and 3,346.56

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Solution

The fourth proportional to 9,920.64, 14,880 and 3,346.56 is: 5,019.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,920.64 : 14,880 = 3,346.56 : x
  2. Step 2: Convert to fraction form
    9,920.64/14,880 = 3,346.56/x
  3. Step 3: Cross multiply
    9,920.64x = 14,880 × 3,346.56
  4. Step 4: Simplify right side
    9,920.64x = 49,796,812.80
  5. Step 5: Solve for x
    x = 49,796,812.80/9,920.64
  6. Step 6: Final answer
    x = 5,019.52

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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.