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Finding the Fourth Proportional to 9,012.78, 13,520.70 and 2,772.65

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Solution

The fourth proportional to 9,012.78, 13,520.70 and 2,772.65 is: 4,159.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,012.78 : 13,520.70 = 2,772.65 : x
  2. Step 2: Convert to fraction form
    9,012.78/13,520.70 = 2,772.65/x
  3. Step 3: Cross multiply
    9,012.78x = 13,520.70 × 2,772.65
  4. Step 4: Simplify right side
    9,012.78x = 37,488,087.39
  5. Step 5: Solve for x
    x = 37,488,087.39/9,012.78
  6. Step 6: Final answer
    x = 4,159.44

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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.