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Finding the Fourth Proportional to 7,281.84, 10,920.44 and 3,817.20

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Solution

The fourth proportional to 7,281.84, 10,920.44 and 3,817.20 is: 5,724.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,281.84 : 10,920.44 = 3,817.20 : x
  2. Step 2: Convert to fraction form
    7,281.84/10,920.44 = 3,817.20/x
  3. Step 3: Cross multiply
    7,281.84x = 10,920.44 × 3,817.20
  4. Step 4: Simplify right side
    7,281.84x = 41,685,503.57
  5. Step 5: Solve for x
    x = 41,685,503.57/7,281.84
  6. Step 6: Final answer
    x = 5,724.58

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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.