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Finding the Fourth Proportional to 12,759.95, 19,142.22 and 5,259.34

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Solution

The fourth proportional to 12,759.95, 19,142.22 and 5,259.34 is: 7,889.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,759.95 : 19,142.22 = 5,259.34 : x
  2. Step 2: Convert to fraction form
    12,759.95/19,142.22 = 5,259.34/x
  3. Step 3: Cross multiply
    12,759.95x = 19,142.22 × 5,259.34
  4. Step 4: Simplify right side
    12,759.95x = 100,675,347.62
  5. Step 5: Solve for x
    x = 100,675,347.62/12,759.95
  6. Step 6: Final answer
    x = 7,889.95

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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.