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Finding the Fourth Proportional to 9,949.20, 14,930.70 and 7,489.20

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Solution

The fourth proportional to 9,949.20, 14,930.70 and 7,489.20 is: 11,238.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,949.20 : 14,930.70 = 7,489.20 : x
  2. Step 2: Convert to fraction form
    9,949.20/14,930.70 = 7,489.20/x
  3. Step 3: Cross multiply
    9,949.20x = 14,930.70 × 7,489.20
  4. Step 4: Simplify right side
    9,949.20x = 111,818,998.44
  5. Step 5: Solve for x
    x = 111,818,998.44/9,949.20
  6. Step 6: Final answer
    x = 11,238.99

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1.5x scale

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.