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Finding the Fourth Proportional to 7,951.55, 11,928.65 and 2,687.06

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Solution

The fourth proportional to 7,951.55, 11,928.65 and 2,687.06 is: 4,031.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,951.55 : 11,928.65 = 2,687.06 : x
  2. Step 2: Convert to fraction form
    7,951.55/11,928.65 = 2,687.06/x
  3. Step 3: Cross multiply
    7,951.55x = 11,928.65 × 2,687.06
  4. Step 4: Simplify right side
    7,951.55x = 32,052,925.19
  5. Step 5: Solve for x
    x = 32,052,925.19/7,951.55
  6. Step 6: Final answer
    x = 4,031.03

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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.