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Finding the Fourth Proportional to 18,393.78, 25,391.12 and 12,433.52

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Solution

The fourth proportional to 18,393.78, 25,391.12 and 12,433.52 is: 17,163.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,393.78 : 25,391.12 = 12,433.52 : x
  2. Step 2: Convert to fraction form
    18,393.78/25,391.12 = 12,433.52/x
  3. Step 3: Cross multiply
    18,393.78x = 25,391.12 × 12,433.52
  4. Step 4: Simplify right side
    18,393.78x = 315,700,998.34
  5. Step 5: Solve for x
    x = 315,700,998.34/18,393.78
  6. Step 6: Final answer
    x = 17,163.46

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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.