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Finding the Fourth Proportional to 13,219.75, 18,244.88 and 7,630.75

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Solution

The fourth proportional to 13,219.75, 18,244.88 and 7,630.75 is: 10,531.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,219.75 : 18,244.88 = 7,630.75 : x
  2. Step 2: Convert to fraction form
    13,219.75/18,244.88 = 7,630.75/x
  3. Step 3: Cross multiply
    13,219.75x = 18,244.88 × 7,630.75
  4. Step 4: Simplify right side
    13,219.75x = 139,222,118.06
  5. Step 5: Solve for x
    x = 139,222,118.06/13,219.75
  6. Step 6: Final answer
    x = 10,531.37

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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.