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Finding the Fourth Proportional to 8,483.40, 12,728.70 and 4,098.60

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Solution

The fourth proportional to 8,483.40, 12,728.70 and 4,098.60 is: 6,149.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,483.40 : 12,728.70 = 4,098.60 : x
  2. Step 2: Convert to fraction form
    8,483.40/12,728.70 = 4,098.60/x
  3. Step 3: Cross multiply
    8,483.40x = 12,728.70 × 4,098.60
  4. Step 4: Simplify right side
    8,483.40x = 52,169,849.82
  5. Step 5: Solve for x
    x = 52,169,849.82/8,483.40
  6. Step 6: Final answer
    x = 6,149.64

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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.