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Finding the Fourth Proportional to 7,212.71, 10,817.21 and 2,830.21

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Solution

The fourth proportional to 7,212.71, 10,817.21 and 2,830.21 is: 4,244.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,212.71 : 10,817.21 = 2,830.21 : x
  2. Step 2: Convert to fraction form
    7,212.71/10,817.21 = 2,830.21/x
  3. Step 3: Cross multiply
    7,212.71x = 10,817.21 × 2,830.21
  4. Step 4: Simplify right side
    7,212.71x = 30,614,955.95
  5. Step 5: Solve for x
    x = 30,614,955.95/7,212.71
  6. Step 6: Final answer
    x = 4,244.58

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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.