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Finding the Fourth Proportional to 9,949.92, 13,715.57 and 7,428.20

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Solution

The fourth proportional to 9,949.92, 13,715.57 and 7,428.20 is: 10,239.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,949.92 : 13,715.57 = 7,428.20 : x
  2. Step 2: Convert to fraction form
    9,949.92/13,715.57 = 7,428.20/x
  3. Step 3: Cross multiply
    9,949.92x = 13,715.57 × 7,428.20
  4. Step 4: Simplify right side
    9,949.92x = 101,881,891.36
  5. Step 5: Solve for x
    x = 101,881,891.36/9,949.92
  6. Step 6: Final answer
    x = 10,239.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.