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Finding the Fourth Proportional to 12,713.31, 19,069.97 and 3,479.31

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Solution

The fourth proportional to 12,713.31, 19,069.97 and 3,479.31 is: 5,218.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,713.31 : 19,069.97 = 3,479.31 : x
  2. Step 2: Convert to fraction form
    12,713.31/19,069.97 = 3,479.31/x
  3. Step 3: Cross multiply
    12,713.31x = 19,069.97 × 3,479.31
  4. Step 4: Simplify right side
    12,713.31x = 66,350,337.32
  5. Step 5: Solve for x
    x = 66,350,337.32/12,713.31
  6. Step 6: Final answer
    x = 5,218.97

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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.