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Finding the Fourth Proportional to 7,239.38, 9,989.22 and 4,051.82

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Solution

The fourth proportional to 7,239.38, 9,989.22 and 4,051.82 is: 5,590.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,239.38 : 9,989.22 = 4,051.82 : x
  2. Step 2: Convert to fraction form
    7,239.38/9,989.22 = 4,051.82/x
  3. Step 3: Cross multiply
    7,239.38x = 9,989.22 × 4,051.82
  4. Step 4: Simplify right side
    7,239.38x = 40,474,561.55
  5. Step 5: Solve for x
    x = 40,474,561.55/7,239.38
  6. Step 6: Final answer
    x = 5,590.89

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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.