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Finding the Fourth Proportional to 7,635.25, 11,421.21 and 7,168.69

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Solution

The fourth proportional to 7,635.25, 11,421.21 and 7,168.69 is: 10,723.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,635.25 : 11,421.21 = 7,168.69 : x
  2. Step 2: Convert to fraction form
    7,635.25/11,421.21 = 7,168.69/x
  3. Step 3: Cross multiply
    7,635.25x = 11,421.21 × 7,168.69
  4. Step 4: Simplify right side
    7,635.25x = 81,875,113.91
  5. Step 5: Solve for x
    x = 81,875,113.91/7,635.25
  6. Step 6: Final answer
    x = 10,723.30

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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.