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Finding the Fourth Proportional to 7,715.44, 10,621.56 and 7,362.82

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Solution

The fourth proportional to 7,715.44, 10,621.56 and 7,362.82 is: 10,136.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.44 : 10,621.56 = 7,362.82 : x
  2. Step 2: Convert to fraction form
    7,715.44/10,621.56 = 7,362.82/x
  3. Step 3: Cross multiply
    7,715.44x = 10,621.56 × 7,362.82
  4. Step 4: Simplify right side
    7,715.44x = 78,204,634.40
  5. Step 5: Solve for x
    x = 78,204,634.40/7,715.44
  6. Step 6: Final answer
    x = 10,136.12

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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.