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Finding the Fourth Proportional to 12,918.70, 19,377.98 and 4,153.64

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Solution

The fourth proportional to 12,918.70, 19,377.98 and 4,153.64 is: 6,230.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.70 : 19,377.98 = 4,153.64 : x
  2. Step 2: Convert to fraction form
    12,918.70/19,377.98 = 4,153.64/x
  3. Step 3: Cross multiply
    12,918.70x = 19,377.98 × 4,153.64
  4. Step 4: Simplify right side
    12,918.70x = 80,489,152.85
  5. Step 5: Solve for x
    x = 80,489,152.85/12,918.70
  6. Step 6: Final answer
    x = 6,230.44

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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.