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Finding the Fourth Proportional to 13,240.43, 18,270.44 and 7,935.11

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Solution

The fourth proportional to 13,240.43, 18,270.44 and 7,935.11 is: 10,949.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,240.43 : 18,270.44 = 7,935.11 : x
  2. Step 2: Convert to fraction form
    13,240.43/18,270.44 = 7,935.11/x
  3. Step 3: Cross multiply
    13,240.43x = 18,270.44 × 7,935.11
  4. Step 4: Simplify right side
    13,240.43x = 144,977,859.80
  5. Step 5: Solve for x
    x = 144,977,859.80/13,240.43
  6. Step 6: Final answer
    x = 10,949.64

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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.