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Finding the Fourth Proportional to 7,219.45, 9,953.58 and 5,921.13

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Solution

The fourth proportional to 7,219.45, 9,953.58 and 5,921.13 is: 8,163.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,219.45 : 9,953.58 = 5,921.13 : x
  2. Step 2: Convert to fraction form
    7,219.45/9,953.58 = 5,921.13/x
  3. Step 3: Cross multiply
    7,219.45x = 9,953.58 × 5,921.13
  4. Step 4: Simplify right side
    7,219.45x = 58,936,441.15
  5. Step 5: Solve for x
    x = 58,936,441.15/7,219.45
  6. Step 6: Final answer
    x = 8,163.56

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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.