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Finding the Fourth Proportional to 18,553.47, 27,830.21 and 5,406.87

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Solution

The fourth proportional to 18,553.47, 27,830.21 and 5,406.87 is: 8,110.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,553.47 : 27,830.21 = 5,406.87 : x
  2. Step 2: Convert to fraction form
    18,553.47/27,830.21 = 5,406.87/x
  3. Step 3: Cross multiply
    18,553.47x = 27,830.21 × 5,406.87
  4. Step 4: Simplify right side
    18,553.47x = 150,474,300.51
  5. Step 5: Solve for x
    x = 150,474,300.51/18,553.47
  6. Step 6: Final answer
    x = 8,110.31

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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.