Home / 12,857.60-19,286.40-12,365.52

Finding the Fourth Proportional to 12,857.60, 19,286.40 and 12,365.52

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Solution

The fourth proportional to 12,857.60, 19,286.40 and 12,365.52 is: 18,548.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,857.60 : 19,286.40 = 12,365.52 : x
  2. Step 2: Convert to fraction form
    12,857.60/19,286.40 = 12,365.52/x
  3. Step 3: Cross multiply
    12,857.60x = 19,286.40 × 12,365.52
  4. Step 4: Simplify right side
    12,857.60x = 238,486,364.93
  5. Step 5: Solve for x
    x = 238,486,364.93/12,857.60
  6. Step 6: Final answer
    x = 18,548.28

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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.