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Finding the Fourth Proportional to 7,222.42, 9,966.99 and 4,078.63

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Solution

The fourth proportional to 7,222.42, 9,966.99 and 4,078.63 is: 5,628.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,222.42 : 9,966.99 = 4,078.63 : x
  2. Step 2: Convert to fraction form
    7,222.42/9,966.99 = 4,078.63/x
  3. Step 3: Cross multiply
    7,222.42x = 9,966.99 × 4,078.63
  4. Step 4: Simplify right side
    7,222.42x = 40,651,664.42
  5. Step 5: Solve for x
    x = 40,651,664.42/7,222.42
  6. Step 6: Final answer
    x = 5,628.54

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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.