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Finding the Fourth Proportional to 8,430.62, 12,624.36 and 8,181.18

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Solution

The fourth proportional to 8,430.62, 12,624.36 and 8,181.18 is: 12,250.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,430.62 : 12,624.36 = 8,181.18 : x
  2. Step 2: Convert to fraction form
    8,430.62/12,624.36 = 8,181.18/x
  3. Step 3: Cross multiply
    8,430.62x = 12,624.36 × 8,181.18
  4. Step 4: Simplify right side
    8,430.62x = 103,282,161.54
  5. Step 5: Solve for x
    x = 103,282,161.54/8,430.62
  6. Step 6: Final answer
    x = 12,250.85

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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.