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Finding the Fourth Proportional to 18,419.37, 27,639.99 and 7,323.08

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Solution

The fourth proportional to 18,419.37, 27,639.99 and 7,323.08 is: 10,988.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,419.37 : 27,639.99 = 7,323.08 : x
  2. Step 2: Convert to fraction form
    18,419.37/27,639.99 = 7,323.08/x
  3. Step 3: Cross multiply
    18,419.37x = 27,639.99 × 7,323.08
  4. Step 4: Simplify right side
    18,419.37x = 202,409,857.97
  5. Step 5: Solve for x
    x = 202,409,857.97/18,419.37
  6. Step 6: Final answer
    x = 10,988.97

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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.