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Finding the Fourth Proportional to 5,156.56, 7,724.76 and 2,551.60

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Solution

The fourth proportional to 5,156.56, 7,724.76 and 2,551.60 is: 3,822.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.56 : 7,724.76 = 2,551.60 : x
  2. Step 2: Convert to fraction form
    5,156.56/7,724.76 = 2,551.60/x
  3. Step 3: Cross multiply
    5,156.56x = 7,724.76 × 2,551.60
  4. Step 4: Simplify right side
    5,156.56x = 19,710,497.62
  5. Step 5: Solve for x
    x = 19,710,497.62/5,156.56
  6. Step 6: Final answer
    x = 3,822.41

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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.