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Finding the Fourth Proportional to 9,137.14, 12,609.20 and 5,158.22

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Solution

The fourth proportional to 9,137.14, 12,609.20 and 5,158.22 is: 7,118.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,137.14 : 12,609.20 = 5,158.22 : x
  2. Step 2: Convert to fraction form
    9,137.14/12,609.20 = 5,158.22/x
  3. Step 3: Cross multiply
    9,137.14x = 12,609.20 × 5,158.22
  4. Step 4: Simplify right side
    9,137.14x = 65,040,977.47
  5. Step 5: Solve for x
    x = 65,040,977.47/9,137.14
  6. Step 6: Final answer
    x = 7,118.31

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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.