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Finding the Fourth Proportional to 19,331.84, 28,980.84 and 6,849.92

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Solution

The fourth proportional to 19,331.84, 28,980.84 and 6,849.92 is: 10,268.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,331.84 : 28,980.84 = 6,849.92 : x
  2. Step 2: Convert to fraction form
    19,331.84/28,980.84 = 6,849.92/x
  3. Step 3: Cross multiply
    19,331.84x = 28,980.84 × 6,849.92
  4. Step 4: Simplify right side
    19,331.84x = 198,516,435.53
  5. Step 5: Solve for x
    x = 198,516,435.53/19,331.84
  6. Step 6: Final answer
    x = 10,268.88

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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.