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Finding the Fourth Proportional to 8,484.40, 12,730.20 and 4,099.60

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Solution

The fourth proportional to 8,484.40, 12,730.20 and 4,099.60 is: 6,151.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,484.40 : 12,730.20 = 4,099.60 : x
  2. Step 2: Convert to fraction form
    8,484.40/12,730.20 = 4,099.60/x
  3. Step 3: Cross multiply
    8,484.40x = 12,730.20 × 4,099.60
  4. Step 4: Simplify right side
    8,484.40x = 52,188,727.92
  5. Step 5: Solve for x
    x = 52,188,727.92/8,484.40
  6. Step 6: Final answer
    x = 6,151.14

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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.