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Finding the Fourth Proportional to 18,409.76, 27,625.92 and 7,321.76

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Solution

The fourth proportional to 18,409.76, 27,625.92 and 7,321.76 is: 10,987.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,409.76 : 27,625.92 = 7,321.76 : x
  2. Step 2: Convert to fraction form
    18,409.76/27,625.92 = 7,321.76/x
  3. Step 3: Cross multiply
    18,409.76x = 27,625.92 × 7,321.76
  4. Step 4: Simplify right side
    18,409.76x = 202,270,356.02
  5. Step 5: Solve for x
    x = 202,270,356.02/18,409.76
  6. Step 6: Final answer
    x = 10,987.13

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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.