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Finding the Fourth Proportional to 12,936.16, 17,851.92 and 7,347.16

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Solution

The fourth proportional to 12,936.16, 17,851.92 and 7,347.16 is: 10,139.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,936.16 : 17,851.92 = 7,347.16 : x
  2. Step 2: Convert to fraction form
    12,936.16/17,851.92 = 7,347.16/x
  3. Step 3: Cross multiply
    12,936.16x = 17,851.92 × 7,347.16
  4. Step 4: Simplify right side
    12,936.16x = 131,160,912.55
  5. Step 5: Solve for x
    x = 131,160,912.55/12,936.16
  6. Step 6: Final answer
    x = 10,139.09

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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.