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Finding the Fourth Proportional to 12,393.80, 18,658.37 and 11,305.16

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Solution

The fourth proportional to 12,393.80, 18,658.37 and 11,305.16 is: 17,019.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,393.80 : 18,658.37 = 11,305.16 : x
  2. Step 2: Convert to fraction form
    12,393.80/18,658.37 = 11,305.16/x
  3. Step 3: Cross multiply
    12,393.80x = 18,658.37 × 11,305.16
  4. Step 4: Simplify right side
    12,393.80x = 210,935,858.19
  5. Step 5: Solve for x
    x = 210,935,858.19/12,393.80
  6. Step 6: Final answer
    x = 17,019.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.