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Finding the Fourth Proportional to 5,281.40, 7,919.15 and 2,163.58

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Solution

The fourth proportional to 5,281.40, 7,919.15 and 2,163.58 is: 3,244.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,281.40 : 7,919.15 = 2,163.58 : x
  2. Step 2: Convert to fraction form
    5,281.40/7,919.15 = 2,163.58/x
  3. Step 3: Cross multiply
    5,281.40x = 7,919.15 × 2,163.58
  4. Step 4: Simplify right side
    5,281.40x = 17,133,714.56
  5. Step 5: Solve for x
    x = 17,133,714.56/5,281.40
  6. Step 6: Final answer
    x = 3,244.16

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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.