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Finding the Fourth Proportional to 11,422.90, 17,134.35 and 5,278.90

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Solution

The fourth proportional to 11,422.90, 17,134.35 and 5,278.90 is: 7,918.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,422.90 : 17,134.35 = 5,278.90 : x
  2. Step 2: Convert to fraction form
    11,422.90/17,134.35 = 5,278.90/x
  3. Step 3: Cross multiply
    11,422.90x = 17,134.35 × 5,278.90
  4. Step 4: Simplify right side
    11,422.90x = 90,450,520.22
  5. Step 5: Solve for x
    x = 90,450,520.22/11,422.90
  6. Step 6: Final answer
    x = 7,918.35

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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.