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Finding the Fourth Proportional to 18,423.80, 27,647.80 and 10,109.64

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Solution

The fourth proportional to 18,423.80, 27,647.80 and 10,109.64 is: 15,171.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,423.80 : 27,647.80 = 10,109.64 : x
  2. Step 2: Convert to fraction form
    18,423.80/27,647.80 = 10,109.64/x
  3. Step 3: Cross multiply
    18,423.80x = 27,647.80 × 10,109.64
  4. Step 4: Simplify right side
    18,423.80x = 279,509,304.79
  5. Step 5: Solve for x
    x = 279,509,304.79/18,423.80
  6. Step 6: Final answer
    x = 15,171.10

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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.