Home / 7,857.28-11,787.52-3,240.64

Finding the Fourth Proportional to 7,857.28, 11,787.52 and 3,240.64

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Solution

The fourth proportional to 7,857.28, 11,787.52 and 3,240.64 is: 4,861.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,857.28 : 11,787.52 = 3,240.64 : x
  2. Step 2: Convert to fraction form
    7,857.28/11,787.52 = 3,240.64/x
  3. Step 3: Cross multiply
    7,857.28x = 11,787.52 × 3,240.64
  4. Step 4: Simplify right side
    7,857.28x = 38,199,108.81
  5. Step 5: Solve for x
    x = 38,199,108.81/7,857.28
  6. Step 6: Final answer
    x = 4,861.62

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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.