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Finding the Fourth Proportional to 8,315.55, 12,480.35 and 4,154.31

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Solution

The fourth proportional to 8,315.55, 12,480.35 and 4,154.31 is: 6,234.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,315.55 : 12,480.35 = 4,154.31 : x
  2. Step 2: Convert to fraction form
    8,315.55/12,480.35 = 4,154.31/x
  3. Step 3: Cross multiply
    8,315.55x = 12,480.35 × 4,154.31
  4. Step 4: Simplify right side
    8,315.55x = 51,847,222.04
  5. Step 5: Solve for x
    x = 51,847,222.04/8,315.55
  6. Step 6: Final answer
    x = 6,234.97

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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.