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Finding the Fourth Proportional to 18,391.63, 25,379.45 and 10,436.42

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Solution

The fourth proportional to 18,391.63, 25,379.45 and 10,436.42 is: 14,401.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,391.63 : 25,379.45 = 10,436.42 : x
  2. Step 2: Convert to fraction form
    18,391.63/25,379.45 = 10,436.42/x
  3. Step 3: Cross multiply
    18,391.63x = 25,379.45 × 10,436.42
  4. Step 4: Simplify right side
    18,391.63x = 264,870,599.57
  5. Step 5: Solve for x
    x = 264,870,599.57/18,391.63
  6. Step 6: Final answer
    x = 14,401.69

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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.