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Finding the Fourth Proportional to 8,650.38, 12,966.34 and 3,720.40

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Solution

The fourth proportional to 8,650.38, 12,966.34 and 3,720.40 is: 5,576.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,650.38 : 12,966.34 = 3,720.40 : x
  2. Step 2: Convert to fraction form
    8,650.38/12,966.34 = 3,720.40/x
  3. Step 3: Cross multiply
    8,650.38x = 12,966.34 × 3,720.40
  4. Step 4: Simplify right side
    8,650.38x = 48,239,971.34
  5. Step 5: Solve for x
    x = 48,239,971.34/8,650.38
  6. Step 6: Final answer
    x = 5,576.63

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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.