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Finding the Fourth Proportional to 7,791.21, 10,751.82 and 4,254.42

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Solution

The fourth proportional to 7,791.21, 10,751.82 and 4,254.42 is: 5,871.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,791.21 : 10,751.82 = 4,254.42 : x
  2. Step 2: Convert to fraction form
    7,791.21/10,751.82 = 4,254.42/x
  3. Step 3: Cross multiply
    7,791.21x = 10,751.82 × 4,254.42
  4. Step 4: Simplify right side
    7,791.21x = 45,742,758.04
  5. Step 5: Solve for x
    x = 45,742,758.04/7,791.21
  6. Step 6: Final answer
    x = 5,871.07

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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.