Home / 12,939.12-17,855.64-7,350

Finding the Fourth Proportional to 12,939.12, 17,855.64 and 7,350

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Solution

The fourth proportional to 12,939.12, 17,855.64 and 7,350 is: 10,142.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,939.12 : 17,855.64 = 7,350 : x
  2. Step 2: Convert to fraction form
    12,939.12/17,855.64 = 7,350/x
  3. Step 3: Cross multiply
    12,939.12x = 17,855.64 × 7,350
  4. Step 4: Simplify right side
    12,939.12x = 131,238,954
  5. Step 5: Solve for x
    x = 131,238,954/12,939.12
  6. Step 6: Final answer
    x = 10,142.80

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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.