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Finding the Fourth Proportional to 7,281.30, 10,917.55 and 2,893.70

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Solution

The fourth proportional to 7,281.30, 10,917.55 and 2,893.70 is: 4,338.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,281.30 : 10,917.55 = 2,893.70 : x
  2. Step 2: Convert to fraction form
    7,281.30/10,917.55 = 2,893.70/x
  3. Step 3: Cross multiply
    7,281.30x = 10,917.55 × 2,893.70
  4. Step 4: Simplify right side
    7,281.30x = 31,592,114.44
  5. Step 5: Solve for x
    x = 31,592,114.44/7,281.30
  6. Step 6: Final answer
    x = 4,338.80

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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.