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Finding the Fourth Proportional to 8,331.95, 12,487.19 and 3,939.72

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Solution

The fourth proportional to 8,331.95, 12,487.19 and 3,939.72 is: 5,904.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,331.95 : 12,487.19 = 3,939.72 : x
  2. Step 2: Convert to fraction form
    8,331.95/12,487.19 = 3,939.72/x
  3. Step 3: Cross multiply
    8,331.95x = 12,487.19 × 3,939.72
  4. Step 4: Simplify right side
    8,331.95x = 49,196,012.49
  5. Step 5: Solve for x
    x = 49,196,012.49/8,331.95
  6. Step 6: Final answer
    x = 5,904.51

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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.