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Finding the Fourth Proportional to 19,891.79, 27,450.68 and 10,939.89

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Solution

The fourth proportional to 19,891.79, 27,450.68 and 10,939.89 is: 15,097.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,891.79 : 27,450.68 = 10,939.89 : x
  2. Step 2: Convert to fraction form
    19,891.79/27,450.68 = 10,939.89/x
  3. Step 3: Cross multiply
    19,891.79x = 27,450.68 × 10,939.89
  4. Step 4: Simplify right side
    19,891.79x = 300,307,364.93
  5. Step 5: Solve for x
    x = 300,307,364.93/19,891.79
  6. Step 6: Final answer
    x = 15,097.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.