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Finding the Fourth Proportional to 8,310.15, 12,416.61 and 8,019.56

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Solution

The fourth proportional to 8,310.15, 12,416.61 and 8,019.56 is: 11,982.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,310.15 : 12,416.61 = 8,019.56 : x
  2. Step 2: Convert to fraction form
    8,310.15/12,416.61 = 8,019.56/x
  3. Step 3: Cross multiply
    8,310.15x = 12,416.61 × 8,019.56
  4. Step 4: Simplify right side
    8,310.15x = 99,575,686.81
  5. Step 5: Solve for x
    x = 99,575,686.81/8,310.15
  6. Step 6: Final answer
    x = 11,982.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.