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Finding the Fourth Proportional to 13,033.55, 17,981.01 and 7,989.09

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Solution

The fourth proportional to 13,033.55, 17,981.01 and 7,989.09 is: 11,021.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,033.55 : 17,981.01 = 7,989.09 : x
  2. Step 2: Convert to fraction form
    13,033.55/17,981.01 = 7,989.09/x
  3. Step 3: Cross multiply
    13,033.55x = 17,981.01 × 7,989.09
  4. Step 4: Simplify right side
    13,033.55x = 143,651,907.18
  5. Step 5: Solve for x
    x = 143,651,907.18/13,033.55
  6. Step 6: Final answer
    x = 11,021.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.