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Finding the Fourth Proportional to 7,222.37, 9,966.86 and 4,390.65

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Solution

The fourth proportional to 7,222.37, 9,966.86 and 4,390.65 is: 6,059.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,222.37 : 9,966.86 = 4,390.65 : x
  2. Step 2: Convert to fraction form
    7,222.37/9,966.86 = 4,390.65/x
  3. Step 3: Cross multiply
    7,222.37x = 9,966.86 × 4,390.65
  4. Step 4: Simplify right side
    7,222.37x = 43,760,971.91
  5. Step 5: Solve for x
    x = 43,760,971.91/7,222.37
  6. Step 6: Final answer
    x = 6,059.09

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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.