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Finding the Fourth Proportional to 7,221.60, 10,817.28 and 5,986.08

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Solution

The fourth proportional to 7,221.60, 10,817.28 and 5,986.08 is: 8,966.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,221.60 : 10,817.28 = 5,986.08 : x
  2. Step 2: Convert to fraction form
    7,221.60/10,817.28 = 5,986.08/x
  3. Step 3: Cross multiply
    7,221.60x = 10,817.28 × 5,986.08
  4. Step 4: Simplify right side
    7,221.60x = 64,753,103.46
  5. Step 5: Solve for x
    x = 64,753,103.46/7,221.60
  6. Step 6: Final answer
    x = 8,966.59

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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.