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Finding the Fourth Proportional to 13,238.99, 18,270.10 and 7,270.68

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Solution

The fourth proportional to 13,238.99, 18,270.10 and 7,270.68 is: 10,033.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,238.99 : 18,270.10 = 7,270.68 : x
  2. Step 2: Convert to fraction form
    13,238.99/18,270.10 = 7,270.68/x
  3. Step 3: Cross multiply
    13,238.99x = 18,270.10 × 7,270.68
  4. Step 4: Simplify right side
    13,238.99x = 132,836,128.27
  5. Step 5: Solve for x
    x = 132,836,128.27/13,238.99
  6. Step 6: Final answer
    x = 10,033.70

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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.