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Finding the Fourth Proportional to 18,935.21, 26,130.23 and 10,321.47

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Solution

The fourth proportional to 18,935.21, 26,130.23 and 10,321.47 is: 14,243.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,935.21 : 26,130.23 = 10,321.47 : x
  2. Step 2: Convert to fraction form
    18,935.21/26,130.23 = 10,321.47/x
  3. Step 3: Cross multiply
    18,935.21x = 26,130.23 × 10,321.47
  4. Step 4: Simplify right side
    18,935.21x = 269,702,245.12
  5. Step 5: Solve for x
    x = 269,702,245.12/18,935.21
  6. Step 6: Final answer
    x = 14,243.43

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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.