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Finding the Fourth Proportional to 13,242.75, 18,275.48 and 7,936.54

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Solution

The fourth proportional to 13,242.75, 18,275.48 and 7,936.54 is: 10,952.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,242.75 : 18,275.48 = 7,936.54 : x
  2. Step 2: Convert to fraction form
    13,242.75/18,275.48 = 7,936.54/x
  3. Step 3: Cross multiply
    13,242.75x = 18,275.48 × 7,936.54
  4. Step 4: Simplify right side
    13,242.75x = 145,044,078.04
  5. Step 5: Solve for x
    x = 145,044,078.04/13,242.75
  6. Step 6: Final answer
    x = 10,952.72

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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.