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Finding the Fourth Proportional to 7,221.64, 10,830.92 and 2,291.72

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Solution

The fourth proportional to 7,221.64, 10,830.92 and 2,291.72 is: 3,437.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.64 : 10,830.92 = 2,291.72 : x
  2. Step 2: Convert to fraction form
    7,221.64/10,830.92 = 2,291.72/x
  3. Step 3: Cross multiply
    7,221.64x = 10,830.92 × 2,291.72
  4. Step 4: Simplify right side
    7,221.64x = 24,821,435.98
  5. Step 5: Solve for x
    x = 24,821,435.98/7,221.64
  6. Step 6: Final answer
    x = 3,437.09

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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.