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Finding the Fourth Proportional to 12,807.52, 19,211.28 and 3,447.56

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Solution

The fourth proportional to 12,807.52, 19,211.28 and 3,447.56 is: 5,171.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,807.52 : 19,211.28 = 3,447.56 : x
  2. Step 2: Convert to fraction form
    12,807.52/19,211.28 = 3,447.56/x
  3. Step 3: Cross multiply
    12,807.52x = 19,211.28 × 3,447.56
  4. Step 4: Simplify right side
    12,807.52x = 66,232,040.48
  5. Step 5: Solve for x
    x = 66,232,040.48/12,807.52
  6. Step 6: Final answer
    x = 5,171.34

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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.