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Finding the Fourth Proportional to 6,540.79, 9,811.52 and 2,158.58

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Solution

The fourth proportional to 6,540.79, 9,811.52 and 2,158.58 is: 3,237.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,540.79 : 9,811.52 = 2,158.58 : x
  2. Step 2: Convert to fraction form
    6,540.79/9,811.52 = 2,158.58/x
  3. Step 3: Cross multiply
    6,540.79x = 9,811.52 × 2,158.58
  4. Step 4: Simplify right side
    6,540.79x = 21,178,991.07
  5. Step 5: Solve for x
    x = 21,178,991.07/6,540.79
  6. Step 6: Final answer
    x = 3,237.99

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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.