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Finding the Fourth Proportional to 18,813.98, 25,965.11 and 10,432.54

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Solution

The fourth proportional to 18,813.98, 25,965.11 and 10,432.54 is: 14,397.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.98 : 25,965.11 = 10,432.54 : x
  2. Step 2: Convert to fraction form
    18,813.98/25,965.11 = 10,432.54/x
  3. Step 3: Cross multiply
    18,813.98x = 25,965.11 × 10,432.54
  4. Step 4: Simplify right side
    18,813.98x = 270,882,048.68
  5. Step 5: Solve for x
    x = 270,882,048.68/18,813.98
  6. Step 6: Final answer
    x = 14,397.91

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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.