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Finding the Fourth Proportional to 7,208.64, 9,947.64 and 4,021.92

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Solution

The fourth proportional to 7,208.64, 9,947.64 and 4,021.92 is: 5,550.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,208.64 : 9,947.64 = 4,021.92 : x
  2. Step 2: Convert to fraction form
    7,208.64/9,947.64 = 4,021.92/x
  3. Step 3: Cross multiply
    7,208.64x = 9,947.64 × 4,021.92
  4. Step 4: Simplify right side
    7,208.64x = 40,008,612.27
  5. Step 5: Solve for x
    x = 40,008,612.27/7,208.64
  6. Step 6: Final answer
    x = 5,550.09

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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.