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Finding the Fourth Proportional to 18,491.88, 25,518.78 and 9,993.96

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Solution

The fourth proportional to 18,491.88, 25,518.78 and 9,993.96 is: 13,791.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.88 : 25,518.78 = 9,993.96 : x
  2. Step 2: Convert to fraction form
    18,491.88/25,518.78 = 9,993.96/x
  3. Step 3: Cross multiply
    18,491.88x = 25,518.78 × 9,993.96
  4. Step 4: Simplify right side
    18,491.88x = 255,033,666.57
  5. Step 5: Solve for x
    x = 255,033,666.57/18,491.88
  6. Step 6: Final answer
    x = 13,791.66

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Half scale
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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.