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Finding the Fourth Proportional to 7,615.50, 11,421.18 and 2,684.50

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Solution

The fourth proportional to 7,615.50, 11,421.18 and 2,684.50 is: 4,026.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,615.50 : 11,421.18 = 2,684.50 : x
  2. Step 2: Convert to fraction form
    7,615.50/11,421.18 = 2,684.50/x
  3. Step 3: Cross multiply
    7,615.50x = 11,421.18 × 2,684.50
  4. Step 4: Simplify right side
    7,615.50x = 30,660,157.71
  5. Step 5: Solve for x
    x = 30,660,157.71/7,615.50
  6. Step 6: Final answer
    x = 4,026.02

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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.