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Finding the Fourth Proportional to 18,998.16, 28,477.80 and 9,620.82

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Solution

The fourth proportional to 18,998.16, 28,477.80 and 9,620.82 is: 14,421.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,998.16 : 28,477.80 = 9,620.82 : x
  2. Step 2: Convert to fraction form
    18,998.16/28,477.80 = 9,620.82/x
  3. Step 3: Cross multiply
    18,998.16x = 28,477.80 × 9,620.82
  4. Step 4: Simplify right side
    18,998.16x = 273,979,787.80
  5. Step 5: Solve for x
    x = 273,979,787.80/18,998.16
  6. Step 6: Final answer
    x = 14,421.39

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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.