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Finding the Fourth Proportional to 7,200.56, 9,936.78 and 3,888.56

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Solution

The fourth proportional to 7,200.56, 9,936.78 and 3,888.56 is: 5,366.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,200.56 : 9,936.78 = 3,888.56 : x
  2. Step 2: Convert to fraction form
    7,200.56/9,936.78 = 3,888.56/x
  3. Step 3: Cross multiply
    7,200.56x = 9,936.78 × 3,888.56
  4. Step 4: Simplify right side
    7,200.56x = 38,639,775.50
  5. Step 5: Solve for x
    x = 38,639,775.50/7,200.56
  6. Step 6: Final answer
    x = 5,366.22

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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.