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Finding the Fourth Proportional to 7,261.60, 10,890.80 and 2,644.64

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Solution

The fourth proportional to 7,261.60, 10,890.80 and 2,644.64 is: 3,966.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,261.60 : 10,890.80 = 2,644.64 : x
  2. Step 2: Convert to fraction form
    7,261.60/10,890.80 = 2,644.64/x
  3. Step 3: Cross multiply
    7,261.60x = 10,890.80 × 2,644.64
  4. Step 4: Simplify right side
    7,261.60x = 28,802,245.31
  5. Step 5: Solve for x
    x = 28,802,245.31/7,261.60
  6. Step 6: Final answer
    x = 3,966.38

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1.5x scale

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.