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Finding the Fourth Proportional to 8,415.34, 11,613.10 and 4,638.50

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Solution

The fourth proportional to 8,415.34, 11,613.10 and 4,638.50 is: 6,401.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,415.34 : 11,613.10 = 4,638.50 : x
  2. Step 2: Convert to fraction form
    8,415.34/11,613.10 = 4,638.50/x
  3. Step 3: Cross multiply
    8,415.34x = 11,613.10 × 4,638.50
  4. Step 4: Simplify right side
    8,415.34x = 53,867,375.95
  5. Step 5: Solve for x
    x = 53,867,375.95/8,415.34
  6. Step 6: Final answer
    x = 6,401.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.