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Finding the Fourth Proportional to 19,891.17, 27,448.87 and 10,939.05

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Solution

The fourth proportional to 19,891.17, 27,448.87 and 10,939.05 is: 15,095.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,891.17 : 27,448.87 = 10,939.05 : x
  2. Step 2: Convert to fraction form
    19,891.17/27,448.87 = 10,939.05/x
  3. Step 3: Cross multiply
    19,891.17x = 27,448.87 × 10,939.05
  4. Step 4: Simplify right side
    19,891.17x = 300,264,561.37
  5. Step 5: Solve for x
    x = 300,264,561.37/19,891.17
  6. Step 6: Final answer
    x = 15,095.37

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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.