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Finding the Fourth Proportional to 12,602.70, 18,855.45 and 8,228.70

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Solution

The fourth proportional to 12,602.70, 18,855.45 and 8,228.70 is: 12,311.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,602.70 : 18,855.45 = 8,228.70 : x
  2. Step 2: Convert to fraction form
    12,602.70/18,855.45 = 8,228.70/x
  3. Step 3: Cross multiply
    12,602.70x = 18,855.45 × 8,228.70
  4. Step 4: Simplify right side
    12,602.70x = 155,155,841.42
  5. Step 5: Solve for x
    x = 155,155,841.42/12,602.70
  6. Step 6: Final answer
    x = 12,311.32

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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.