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Finding the Fourth Proportional to 7,200.78, 9,936.45 and 5,313.39

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Solution

The fourth proportional to 7,200.78, 9,936.45 and 5,313.39 is: 7,332.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,200.78 : 9,936.45 = 5,313.39 : x
  2. Step 2: Convert to fraction form
    7,200.78/9,936.45 = 5,313.39/x
  3. Step 3: Cross multiply
    7,200.78x = 9,936.45 × 5,313.39
  4. Step 4: Simplify right side
    7,200.78x = 52,796,234.07
  5. Step 5: Solve for x
    x = 52,796,234.07/7,200.78
  6. Step 6: Final answer
    x = 7,332.02

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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.