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Finding the Fourth Proportional to 13,240.40, 18,270.40 and 7,935.12

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Solution

The fourth proportional to 13,240.40, 18,270.40 and 7,935.12 is: 10,949.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,240.40 : 18,270.40 = 7,935.12 : x
  2. Step 2: Convert to fraction form
    13,240.40/18,270.40 = 7,935.12/x
  3. Step 3: Cross multiply
    13,240.40x = 18,270.40 × 7,935.12
  4. Step 4: Simplify right side
    13,240.40x = 144,977,816.45
  5. Step 5: Solve for x
    x = 144,977,816.45/13,240.40
  6. Step 6: Final answer
    x = 10,949.66

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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.