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Finding the Fourth Proportional to 7,905.44, 10,911.78 and 5,218.62

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Solution

The fourth proportional to 7,905.44, 10,911.78 and 5,218.62 is: 7,203.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,905.44 : 10,911.78 = 5,218.62 : x
  2. Step 2: Convert to fraction form
    7,905.44/10,911.78 = 5,218.62/x
  3. Step 3: Cross multiply
    7,905.44x = 10,911.78 × 5,218.62
  4. Step 4: Simplify right side
    7,905.44x = 56,944,433.34
  5. Step 5: Solve for x
    x = 56,944,433.34/7,905.44
  6. Step 6: Final answer
    x = 7,203.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.