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Finding the Fourth Proportional to 18,649, 27,969.20 and 5,321.74

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Solution

The fourth proportional to 18,649, 27,969.20 and 5,321.74 is: 7,981.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,649 : 27,969.20 = 5,321.74 : x
  2. Step 2: Convert to fraction form
    18,649/27,969.20 = 5,321.74/x
  3. Step 3: Cross multiply
    18,649x = 27,969.20 × 5,321.74
  4. Step 4: Simplify right side
    18,649x = 148,844,810.41
  5. Step 5: Solve for x
    x = 148,844,810.41/18,649
  6. Step 6: Final answer
    x = 7,981.38

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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.