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Finding the Fourth Proportional to 18,623.40, 27,999.90 and 15,772.20

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Solution

The fourth proportional to 18,623.40, 27,999.90 and 15,772.20 is: 23,713.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,623.40 : 27,999.90 = 15,772.20 : x
  2. Step 2: Convert to fraction form
    18,623.40/27,999.90 = 15,772.20/x
  3. Step 3: Cross multiply
    18,623.40x = 27,999.90 × 15,772.20
  4. Step 4: Simplify right side
    18,623.40x = 441,620,022.78
  5. Step 5: Solve for x
    x = 441,620,022.78/18,623.40
  6. Step 6: Final answer
    x = 23,713.18

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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.