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Finding the Fourth Proportional to 18,319.59, 27,460.91 and 7,221.98

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Solution

The fourth proportional to 18,319.59, 27,460.91 and 7,221.98 is: 10,825.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,319.59 : 27,460.91 = 7,221.98 : x
  2. Step 2: Convert to fraction form
    18,319.59/27,460.91 = 7,221.98/x
  3. Step 3: Cross multiply
    18,319.59x = 27,460.91 × 7,221.98
  4. Step 4: Simplify right side
    18,319.59x = 198,322,142.80
  5. Step 5: Solve for x
    x = 198,322,142.80/18,319.59
  6. Step 6: Final answer
    x = 10,825.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.