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Finding the Fourth Proportional to 9,212.55, 13,821.21 and 2,639.22

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Solution

The fourth proportional to 9,212.55, 13,821.21 and 2,639.22 is: 3,959.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,212.55 : 13,821.21 = 2,639.22 : x
  2. Step 2: Convert to fraction form
    9,212.55/13,821.21 = 2,639.22/x
  3. Step 3: Cross multiply
    9,212.55x = 13,821.21 × 2,639.22
  4. Step 4: Simplify right side
    9,212.55x = 36,477,213.86
  5. Step 5: Solve for x
    x = 36,477,213.86/9,212.55
  6. Step 6: Final answer
    x = 3,959.51

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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.