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Finding the Fourth Proportional to 12,674.40, 19,011.60 and 12,455.70

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Solution

The fourth proportional to 12,674.40, 19,011.60 and 12,455.70 is: 18,683.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,674.40 : 19,011.60 = 12,455.70 : x
  2. Step 2: Convert to fraction form
    12,674.40/19,011.60 = 12,455.70/x
  3. Step 3: Cross multiply
    12,674.40x = 19,011.60 × 12,455.70
  4. Step 4: Simplify right side
    12,674.40x = 236,802,786.12
  5. Step 5: Solve for x
    x = 236,802,786.12/12,674.40
  6. Step 6: Final answer
    x = 18,683.55

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Similar ratio
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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.