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Finding the Fourth Proportional to 7,202.45, 9,939.36 and 3,890.45

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Solution

The fourth proportional to 7,202.45, 9,939.36 and 3,890.45 is: 5,368.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,202.45 : 9,939.36 = 3,890.45 : x
  2. Step 2: Convert to fraction form
    7,202.45/9,939.36 = 3,890.45/x
  3. Step 3: Cross multiply
    7,202.45x = 9,939.36 × 3,890.45
  4. Step 4: Simplify right side
    7,202.45x = 38,668,533.42
  5. Step 5: Solve for x
    x = 38,668,533.42/7,202.45
  6. Step 6: Final answer
    x = 5,368.81

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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.